MCQ 1: The water which enters the xylem cells, increase cell's

        A. hydrostatic pressure
        B. hydraulic pressure
        C. water pressure
        D. plasmolysis rate


MCQ 2: The male copulatory organ used to transfer the sperms into the female reproductive tract is called

        A. penis
        B. testis
        C. prepuce
        D. rectum


MCQ 3: In western civilization, thromboembolism may lead to

        A. paralysis
        B. hemorrhage
        C. Death
        D. leukemia


MCQ 4: The organization of photosynthetic pigments into clusters is

        A. photosynthesis
        B. photosynthetic clusters
        C. cluster arrangement
        D. photo system


MCQ 5: The inner semi-fluid of the invertebral disc is

        A. nucleus pulposus
        B. annulus fibrosus
        C. ileum fibrosus
        D. cytoplasmic polposus


MCQ 6: Chlorophylls are soluble in

        A. organic solvents
        B. inorganic solvents
        C. organic solutes
        D. inorganic solutes


MCQ 7: A compound which is found in all living cells and play a key role in energy transformations is

        A. Adenosine Diphosphate (ADP)
        B. Adenosine triphosphate (ATP)
        C. chlorophyll
        D. granum


MCQ 8: Lipids provide insulation against cold and hot weather to the exoskeleton of insects in the form of

        A. cutin
        B. waxes
        C. cholesterol
        D. oil


MCQ 9: Tobacco pipes are made from the wood of

        A. sheesham
        B. pyrus patia
        C. pine
        D. timber


MCQ 10: Freezing temperatures form ice crystals within protoplasm, perforates membranes and organelles, eventually, the cell is

        A. regenerated
        B. killed
        C. phagocytosed
        D. plasmolysed


MCQ 11: Chitinous Setae are the locomotory organs of annelids which are present on

        A. parapodia
        B. cell wall
        C. prostomium
        D. nucleolus


MCQ 12: The outer layer of the adrenal gland is called

        A. adrenal cortex
        B. adrenal medulla
        C. cortex
        D. medulla


MCQ 13: The small intestine is composed of

        A. duodenum
        B. jejunum
        C. ileum
        D. all of above


MCQ 14: The name of antibiotic which is used to lower blood cholesterol made by fungi is

        A. azomycin
        B. clindamycin
        C. tetracycline
        D. lovastatin


MCQ 15: The dome-shaped part under the chest is called

        A. lungs
        B. bronchi
        C. diaphragm
        D. alveoli


MCQ 16: Evolutionary changes help in producing new

        A. individuals
        B. communities
        C. species
        D. plants


MCQ 17: On hydrolysis, sucrose gives one glucose and one

        A. fructose
        B. maltose
        C. lactose
        D. ribose


MCQ 18: The respiration which takes place during day time is called

        A. aerobic
        B. respiration
        C. photorespiration
        D. anaerobic


MCQ 19: The tubular system opens to the exterior through several

        A. nephridiophore
        B. nephrostome
        C. protonephridium
        D. protophrostome


MCQ 20: The animals which have both the features of mammals and reptiles together include

        A. duckbill platypus only
        B. spiny ant eater only
        C. wolves
        D. duckbill platypus and spiny ant eater


MCQ 21: The plants which produce seeds are termed as

        A. spermatophytes
        B. gametophytes
        C. ovulophytes
        D. ovarophytes


MCQ 22: Uterus opens into the vagina through

        A. ovary
        B. oviduct
        C. cervix
        D. urethra


MCQ 23: Tiny thin-walled ducts which are present in the lungs of birds are called

        A. alveoli
        B. bronchi
        C. parabronchi
        D. bronchioles


MCQ 24: Germinating pollen grain is a rich source of

        A. cytokinin
        B. gibberellin
        C. auxin
        D. rennin


MCQ 25: The patients who are suffering from ulcer should avoid

        A. smoking
        B. alcohol
        C. coffee
        D. all of above


MCQ 26: The larval epidermis is produced by

        A. clear cytoplasm
        B. yellow cytoplasm
        C. gray vegetal cytoplasm
        D. brown cytoplasm


MCQ 27: The egg and male gametes fuse to develop into an embryo and endosperm nucleus by the process

        A. conjugation
        B. fertilization
        C. double fertilization
        D. triple fertilization


MCQ 28: The response of passive immunity is

        A. slow
        B. gradual
        C. immediate
        D. hard


MCQ 29: The placenta passes out through the vagina

        A. 10-20 minutes after birth
        B. 10-15 minutes after birth
        C. 10-30 minutes after birth
        D. 10-45 minutes after birth


MCQ 30: Groups of sporangia are found on the underside of reflexed lobes of margins of leaflets and protected by a bent margin of the leaflet is called

        A. sori
        B. sertoli
        C. tine
        D. petioli


MCQ 31: The heart of an amphibian has three chambers which are

        A. 2 ventricles and 1 auricle
        B. 2 auricles and 1 ventricle
        C. 3 ventricles and no auricle
        D. 3 auricles and no ventricle


MCQ 32: In humans' ciliated epithelium, mucous membrane filter foreign particles to enter in

        A. oral cavity
        B. nasal cavity
        C. buccal cavity
        D. digestive tract


MCQ 33: Death or mental retardation takes place if accumulation happens in

        A. somatic cells
        B. brain cells
        C. meristematic cells
        D. sensory cells


MCQ 34: There is a thick layer of insulating fat in whales and seals which protects them from colder water, this layer is known as

        A. brown fat
        B. cuticle
        C. blubber
        D. integument


MCQ 35: When an impulse reaches a synaptic knob, synaptic vesicles fuse with the

        A. pre-synaptic membrane
        B. post-synaptic membrane
        C. synaptic cleft
        D. neurotransmitters


MCQ 36: In obese patients, the fat is stored in tissues called

        A. adipose
        B. dispose
        C. tripose
        D. terapose


MCQ 37: The signs of aging include which of the following?

        A. loss of hair pigment
        B. dryness and wrinkling of skin
        C. forgetfulness
        D. all of above


MCQ 38: The rate of growth stops and plants die at a temperature of

        A. 20-30 °C
        B. 10-20 °C
        C. 35-40 °C
        D. 5-10 °C


MCQ 39: Identical gametes are also known as

        A. heterogametes
        B. isogametes
        C. anisogamete
        D. hypogametes


MCQ 40: Hemorrhage occurs when the walls of arteries become hard and lose their

        A. permeability
        B. elasticity
        C. fluids
        D. turgidity


MCQ 41: A large and important group of a compound which can be made by the repetition of simple isoprenoid units is called

        A. terpenoids
        B. steroids
        C. carotenoids
        D. terpenses


MCQ 42: The thick secretions which cover inside of the stomach are called

        A. mucosa
        B. zymogen
        C. gastric
        D. mucus


MCQ 43: The scientist who first isolated nuclei of pus cells were

        A. F.Sanger
        B. M.Steward
        C. F.Miescher
        D. A.Einstein


MCQ 44: When an early embryo or single egg divides into one or more separate embryos, it gives birth to

        A. nonidentical twins
        B. identical twins
        C. triplets
        D. singles


MCQ 45: The joints which are held together by fibers of connective tissue are called

        A. fibrous joints
        B. synovial joints
        C. hinge joints
        D. ball and socket joints


MCQ 46: Male gametes of bryophyte plant are called

        A. antherozoids
        B. archegonia
        C. spermatogonia
        D. spermaphytes


MCQ 47: The main transmitter for synapses that lie outside the central nervous system is

        A. serotonin
        B. adrenaline
        C. acetylcholine
        D. dopamine


MCQ 48: Tetroses are not very common, they are found rare in nature and few

        A. viruses
        B. bacteria
        C. plants
        D. animals


MCQ 49: The medulla of adrenals produces the hormone

        A. adrenaline only
        B. nor-adrenaline only
        C. cortico-steroids
        D. adrenaline and non-adrenaline


MCQ 50: Chlorophyll converts light energy into

        A. heat energy
        B. chemical energy
        C. potential energy
        D. electrical energy


MCQ 51: NAD is an abbreviation for

        A. Nicotine Abusive Department
        B. Nicotine Avoid Directions
        C. Nicotinamide adenine dinucleotide
        D. Nicotinamide dinucleotide


MCQ 52: The extensive convoluted part of Bowman's capsule is called

        A. vasa recta
        B. renal hilus
        C. loop of henel
        D. distal part


MCQ 53: In reproduction, Vernalin hormone resembles

        A. cytokinin
        B. auxin
        C. gibberellin
        D. ethene


MCQ 54: Weed killing is done by which chemical?

        A. 2,4 Dichlorophenoxyacetic Acid (2,4-D)
        B. phenols
        C. Indole -3-Acetic Acid(IAA)
        D. Ethane


MCQ 55: Water molds are another name of

        A. oomycetes
        B. mycetes
        C. dicots
        D. monocytes


MCQ 56: Gastrin is the hormone produced by the mucosa of the pyloric region of the

        A. kidney
        B. lungs
        C. stomach
        D. intestine


MCQ 57: A protein which acts as a carrier and transport oxygen and carbon dioxide in the human body is known as

        A. hemoglobin
        B. immunoglobulin
        C. lipids
        D. antibody


MCQ 58: Inside the neuron, the membrane is made more negative by

        A. carbohydrates
        B. fats
        C. proteins and organic acids
        D. lipids


MCQ 59: The formation of thrombus in the heart can lead to

        A. heart burning
        B. heart attack
        C. heart blockage
        D. heart failure


MCQ 60: The lining of the duodenum releases enzyme called

        A. trypsin
        B. trypsinogen
        C. erepsin
        D. sterol esterase


MCQ 61: The original volume of the cell wall is restored after the removal of

        A. water
        B. salts
        C. carbon dioxide
        D. nutrients


MCQ 62: If two different types of individuals structurally or functionally occur in the same organism, this condition is called

        A. heteromorphism
        B. morphism
        C. polymorphism
        D. hypomorphism


MCQ 63: In kingdom Animalia, Neiris belong to the class

        A. polychaeta
        B. hirudinea
        C. oligochaete
        D. animalia


MCQ 64: Water molecules move rapidly hence possess

        A. potential energy
        B. chemical energy
        C. kinetic energy
        D. electrical energy


MCQ 65: Secondary tissue is added by the

        A. intercalary meristem only
        B. vascular cambium only
        C. apical meristems
        D. intercalary meristem and vacsular cambium


MCQ 66: Prothrombin protein acts as a catalyst and help in blood

        A. clotting
        B. flow
        C. pH
        D. consistency


MCQ 67: A nerve impulse is passed from one neuron to the other through

        A. node of Ranvier
        B. synapse
        C. cell body
        D. dendrites


MCQ 68: The plants which have been infused foreign DNA into their cells are

        A. genetic plants
        B. unicellular plants
        C. multicellular plants
        D. transgenic plants


MCQ 69: Photosynthesis is the process in which inorganic compounds are reduced to organic compounds using

        A. heat energy
        B. light energy
        C. chemical energy
        D. electrical energy


MCQ 70: Viruses which infect bacteria are called

        A. microphages
        B. bacteriophages
        C. autophagy
        D. congo virus


MCQ 71: The animals of division Radiata are

        A. triploblastic
        B. diploblastic
        C. radioblastic
        D. quadroblastic


MCQ 72: In growth and development, Stage one in differentiation involves

        A. recognition of apical meristems
        B. formation of embryo
        C. recognition of cambium
        D. production of leaf primordial


MCQ 73: The sympathetic nervous system is associated with

        A. hormonal secretions
        B. fear and rage
        C. skeletal muscles
        D. fight and flight


MCQ 74: The greater the number of carbon atoms in chain results in the higher

        A. melting point
        B. boiling point
        C. freezing point
        D. stability


MCQ 75: The effect of auxin diffusing from the apical bud on the lateral shoots is known as

        A. promoting effect
        B. compensatory effect
        C. inhibitory effect
        D. supporting effect


MCQ 76: The lobe of pituitary often referred to as the master gland, is the

        A. frontal
        B. posterior
        C. anterior
        D. median


MCQ 77: Secondary spermatocytes and spermatids are formed by a meiotic division in

        A. primary spermatocytes
        B. spermatogonia
        C. primary oocytes
        D. polar body


MCQ 78: The immunity which is achieved by the introduction of antigen artificially in the body is called

        A. active immunity
        B. passive immunity
        C. artificially induced immunity
        D. auto-immunity


MCQ 79: The central cavity of the kidneys is known as

        A. ureter
        B. pelvis
        C. bladder
        D. medulla


MCQ 80: A degenerative arterial change which is associated with advancing age is called

        A. arteriosclerosis
        B. atheroma
        C. lipoproteins
        D. fructoproteins


MCQ 81: The anterior end of the neural groove forms the future

        A. liver
        B. spinal cord
        C. heart
        D. brain


MCQ 82: Blastula stage is characterized by the presence of

        A. blastoderm
        B. blastocoele
        C. neural plate
        D. coelom


MCQ 83: For terrestrial adaptation, Bryophytes form a special structure to absorb water is known as

        A. antherozoids
        B. rhizoids
        C. water molds
        D. hydrophiles


MCQ 84: The detoxification of ammonia to citrulline requires the precursor of

        A. ornithine
        B. arginine
        C. creatine
        D. glutamine


MCQ 85: The mesoderm is derived from wall of developing gut (archenteron) in the series

        A. deutrostomia
        B. pterostomia
        C. protrostomia
        D. pretostomia


MCQ 86: Bony fishes have a brain which is composed of 10 pains of

        A. cranial nerves
        B. ganglia
        C. flame cells
        D. neurons


MCQ 87: The most common chronic arthritis which degenerates joints is

        A. osteoporosis
        B. Arthritis
        C. cleft palate
        D. osteoarthritis


MCQ 88: Hypothalamus is a part of

        A. midbrain
        B. forebrain
        C. hindbrain
        D. none of others


MCQ 89: The lower jaw of mammals is composed of only one

        A. teeth
        B. bone
        C. cartilage
        D. muscles


MCQ 90: The secondary growth in the plant, girth due to

        A. vascular cambium only
        B. cork cambium only
        C. vascular cork
        D. vascular and cork cambium


MCQ 91: Bilobed-mass composed of two ganglia are present in the body of

        A. hydra
        B. planaria
        C. humans
        D. rats


MCQ 92: The body of mammals is covered by

        A. feathers
        B. hairs
        C. scales
        D. fins


MCQ 93: In growth and development, Blastoderm splits during

        A. neurulation
        B. gastrulation
        C. blastulation
        D. pompulation


MCQ 94: The normal flow of blood is facilitated by the muscular activity of

        A. digestion
        B. breathing
        C. excretion
        D. pumping of heart


MCQ 95: Tracheid are found in xylem as

        A. pectin
        B. cellulose
        C. bundle caps
        D. seive tubes


MCQ 96: Elevated temperatures damage metabolism by denaturing

        A. proteins
        B. enzymes
        C. carbohydrates
        D. fats


MCQ 97: The leaf which is large and with divided vein and veinlets with expanded lamina is called

        A. aphyll
        B. macrophyll
        C. microphyll
        D. megaphyll


MCQ 98: Renal retention of salts and water lead to the disease

        A. kidney stones
        B. oedema
        C. leucaemia
        D. Anemia


MCQ 99: The bile secretion of the liver helps in emulsifying fats in

        A. large intestine
        B. small intestine
        C. stomach
        D. rectum


MCQ 100: The anterior end of the primitive streak is occupied by

        A. mesodermal cells
        B. notochordal cells
        C. endodermal cells
        D. ectodermal cells


MCQ 101: In a normal human being, the number of chromosomes is

        A. 23
        B. 46
        C. 53
        D. 26


MCQ 102: The subunits of the capsid are called

        A. capsule
        B. capsomeres
        C. centromeres
        D. centrioles


MCQ 103: Some fungi are poisonous such as death angel (amanita) and Jack-o' lantern mushroom, they are termed as

        A. toadstools
        B. veriline
        C. bryophyta
        D. toxic


MCQ 104: An organism which can prepare their food is called

        A. heterotrophic
        B. autotrophic
        C. mototropic
        D. hypotrophic


MCQ 105: In reproduction, Vernalisation is induced by the hormone

        A. veriline
        B. vermalin
        C. vernalin
        D. venralin


MCQ 106: In brassica, rose and mango plants, the stomata open and close according to availability of

        A. salts
        B. nutrients
        C. sunlight
        D. water


MCQ 107: The most unusual protist phyla are

        A. coflagellates
        B. dinoflagellates
        C. choanoflagellates
        D. paraflagellates


MCQ 108: The number of nucleotide in a tRNA chain length is

        A. 70-90
        B. 75-95
        C. 70-80
        D. 75-90


MCQ 109: Whisk Ferns belong to the group called

        A. tracheophyta
        B. bryophyta
        C. tricophyta
        D. quadrophyta


MCQ 110: The respiration at the organism level is known as

        A. breathing only
        B. ventilation only
        C. inhalation
        D. breathing and ventilation


MCQ 111: If a lobster loses its pincer claw it

        A. regenerates new claw
        B. becomes impaired
        C. dies
        D. vanishes


MCQ 112: When the fungal hyphae extend into the soil and penetrate the outer cells of plant root while forming the branches are a type of

        A. mycorrhizae
        B. exomycorrhizae
        C. endomycorrhizae
        D. ploromycorrhizae


MCQ 113: In rats, the ability to withstand any stress situation such as a cold is diminished, if following is removed

        A. adrenal cortex
        B. adrenal medulla
        C. cortex
        D. medulla


MCQ 114: The phase in which the death rate is equal to the reproduction and multiplication rate is

        A. action phase
        B. stationary phase
        C. medial phase
        D. cease phase


MCQ 115: The suspended tubular structures which collect excretory products from hemolymph are called

        A. protonephridium
        B. metanephridium
        C. malpighian tubules
        D. exoluticus tubules


MCQ 116: The measure of capacity to do electrical work is called

        A. impulse potential
        B. electrical potential
        C. charge potential
        D. ion potential


MCQ 117: Cnidarians and annelids have which type of skeleton?

        A. exoskeleton
        B. hydrostatic skeleton
        C. Axial Skeleton
        D. endoskeleton


MCQ 118: T-lymphocytes fails the immune system making the individual vulnerable to all other

        A. diseases
        B. viruses
        C. bacteria
        D. fungus


MCQ 119: Diffused type nervous system is present in

        A. hydra
        B. rats
        C. earthworm
        D. amoeba


MCQ 120: The blood of chronic kidney failed patient is purified by passing it through

        A. filter
        B. pace maker
        C. artificial kidney
        D. transplanting kidney


MCQ 121: Degeneration of cartilage gives rise to

        A. arthritis
        B. epilepsy
        C. parkinson's disease
        D. goiter


MCQ 122: The length of axon may be more than

        A. five meter long
        B. one meter long
        C. two meter long
        D. three meter long


MCQ 123: Virus depend on other plants and animals for its synthesis, that's why it is known as

        A. obligatory intracellular parasite
        B. obligatory extracellular parasite
        C. obligatory parasite
        D. intracellular parasite


MCQ 124: The yellowing of the plants is due to the absence of

        A. calcium
        B. chlorophyll
        C. magnesium
        D. nitrogen


MCQ 125: An antibiotic can discolor the teeth of young children permanently is

        A. Clindamycin
        B. azithromycin
        C. tetracycline
        D. streptomycin


MCQ 126: Apical meristems are found at the tips of

        A. root
        B. shoot
        C. both root and shoot
        D. cotyledon


MCQ 127: Lub' sound is produced when tricuspid and bicuspid valves are

        A. opened
        B. closed
        C. half-opened
        D. half-closed


MCQ 128: The cleavage in which planes of cleavage are symmetrical to the polar axis and produce tiers of cells is radial and

        A. spiral
        B. indeterminate
        C. determinate
        D. independent


MCQ 129: The plants which feed on small insects and organic compounds are called

        A. parasites
        B. insectivorous
        C. carnivorous
        D. herbivorous


MCQ 130: Aflatoxins are the most carcinogenic toxins which are produced by

        A. aspergillus
        B. aspergillus
        C. carcinogillus
        D. thombogillus


MCQ 131: Na+ diffusion into the neuron causes its membrane to undergo

        A. polarization
        B. depolarization
        C. neutralization
        D. semi-polarization


MCQ 132: The virus which is responsible for AIDS is typically known as

        A. Hepatitis B Virus (HBV)
        B. Human Immunodeficiency Virus (HIV)
        C. Hepatitis C Virus (HCV)
        D. Hepatitis A Virus(HAV)


MCQ 133: The network of closed tubules without internal openings are called

        A. protonephridium
        B. metanephridium
        C. malpighian tubules
        D. exoluticus tubules


MCQ 134: The transpiration is very essential for plants as it helps plants to

        A. cools
        B. exchange gases
        C. remove water
        D. uptake water


MCQ 135: The proteins which are synthesized by blood to protect the body from nucleic acids and toxins of invading organism

        A. interferon only
        B. antitoxins only
        C. antigens
        D. interferon and antitoxins


MCQ 136: The twins which are produced asexually are

        A. dizygotic twins
        B. non-identical twins
        C. identical twins
        D. diembryonic twins


MCQ 137: The nuclear fusion in basidium Is done by the process of

        A. budding
        B. meiosis
        C. mitosis
        D. grafting


MCQ 138: The arginine is split to form urea by the enzyme activity of

        A. arginase
        B. ornithine
        C. carboxylate
        D. sulfuricate


MCQ 139: Distention of cervix stimulates the release of

        A. testosterone
        B. oestrogen
        C. oxytocin
        D. thyroxine


MCQ 140: There are four bands of muscles in Nematodes, two are dorsolateral and two

        A. ventro-lateral
        B. dorso-ventral
        C. dorso-lateral
        D. later-ventral


MCQ 141: Bacteria which obtain their food from dead organic matter called

        A. heterotrophs
        B. autotrophs
        C. saprophytic
        D. symbiotic


MCQ 142: An average of 15-50% of the world's food is destroyed each year due to the attack of

        A. algae
        B. hydra
        C. parasites
        D. fungi


MCQ 143: The smallest contractile unit of muscle fiber is

        A. myofilament
        B. fibrils
        C. tendons
        D. sarcomere


MCQ 144: Cranial nerves also known as cerebral nerves arise from the

        A. brain
        B. spinal cord
        C. vertebral column
        D. peripheral nerves


MCQ 145: The ureter of both kidneys pour the urine in to

        A. pelvis
        B. urinary bladder
        C. urethra
        D. ureter


MCQ 146: The meaning of the word Cephalo is

        A. neck
        B. shoulders
        C. head
        D. brain


MCQ 147: Pigments containing bodies which are bounded by the membrane are called

        A. plastids
        B. chlorophyll
        C. chloroplast
        D. hemoglobin


MCQ 148: Muscle cells are produced by which cytoplasm?

        A. clear cytoplasm
        B. yellow cytoplasm
        C. gray vegetal cytoplasm
        D. brown cytoplasm


MCQ 149: Ustilago species of Fungi are the most common example of

        A. smut fungi
        B. penicillum
        C. hyphal fungi
        D. bacterium


MCQ 150: The main sources of carbohydrates are

        A. milk
        B. water
        C. green plants
        D. proteins


MCQ 151: Double circuit heart is present in

        A. reptiles
        B. birds
        C. mammals
        D. all of above


MCQ 152: In the natural process, the sporophyte undergoes fertilization which provides a large amount of genetic

        A. variability
        B. mutation
        C. transfer
        D. recombination


MCQ 153: The water is evaporated from the plant through

        A. lamina
        B. mid-rib
        C. stomata
        D. roots


MCQ 154: Many of the sensory stimuli of the nervous system are converted into hormonal responses in

        A. thalamus
        B. hypothalamus
        C. cerebrum
        D. pons


MCQ 155: The protection of the internal environment from the harms by the external environment is termed as

        A. thermoregulation
        B. homeostasis
        C. osmoregulation
        D. nerve impulse


MCQ 156: A bridge of nerve fibers which connects the two cerebral hemispheres is called

        A. corpus leuteum
        B. corpus callus
        C. corpus callosum
        D. corpus scrotum


MCQ 157: Ecological importance in terms of bio indicators of pollution is the attribute of

        A. lichens
        B. green algae
        C. fungi
        D. nematodes


MCQ 158: Biologists believe that mammals have been evolved from their reptilian ancestors they

        A. dinosaurs
        B. brachiosaurs
        C. cotylasaurs
        D. dicotylasaurs


MCQ 159: African sleeping sickness is caused by a human parasite called

        A. trysoma
        B. panosoma
        C. trypanosoma
        D. dipanosoma


MCQ 160: The evolution fusion of vascular strands given rise to a pattern called

        A. vacsular venation
        B. reticulation
        C. venation
        D. reticulate venation


MCQ 161: The multicellular haploid gametophytic generation alternates with the multicellular diploid sporophytic generation. This cycle is called

        A. medium of generation
        B. alternation of generation
        C. evolution of generation
        D. allertness of generation


MCQ 162: Roots response towards gravity is the display of

        A. positive geotropism
        B. negative geotropism
        C. neutral geotropism
        D. static geotropism


MCQ 163: Melanophore stimulating hormone (MSH) is secreted by which lobe of pituitary?

        A. anterior
        B. posterior
        C. median
        D. frontal


MCQ 164: Their evolutional developmental shows regular

        A. autotrophic alternation of generation
        B. homomorphic alternation of generation
        C. heteromorphic alternation of generation
        D. none of others


MCQ 165: The tail attached to the pyrrole ring is called

        A. porphyrin
        B. tail
        C. phytol
        D. none of others


MCQ 166: More than 90% of families of flowering plants have

        A. hyphae
        B. mycorrhizae
        C. chloroplast
        D. nutrients


MCQ 167: The receptors for smell, taste and for blood Oxygen, etc. are

        A. Mechanoreceptors
        B. Chemoreceptors
        C. Thermoreceptors
        D. Nociceptors


MCQ 168: Red blood cells are also called

        A. thrombocytes
        B. leukocytes
        C. erythrocytes
        D. lymphs


MCQ 169: In Ascent of Sap, water and dissolved minerals are taken up by leaves through

        A. phloem tissue
        B. xylem tissue
        C. vascular tissue
        D. lamina tissue


MCQ 170: Multiple fission is a characteristic reproduction mechanism in

        A. plant like protoctists
        B. animal like protoctists
        C. hydra
        D. earthworm


MCQ 171: When rod-shaped bacteria appears to be in pair arrangement it is termed as

        A. staphylococci
        B. bacillus
        C. diplobacilli
        D. streptobaccili


MCQ 172: Generations reproduced sexually and asexually in coelenterates, are

        A. haploid
        B. diploid
        C. triploblastic
        D. diploblastic


MCQ 173: The archegonium consists of a neck and a

        A. tail
        B. venter
        C. root
        D. antenae


MCQ 174: Release of corticotrophin-releasing factor is controlled by nervous stimulation of hypothalamus as a result of

        A. stress
        B. heat and cold
        C. pain
        D. all of above


MCQ 175: Annelids have a specialized structure for excretion called

        A. flame cells
        B. nephridia
        C. bulb cells
        D. bacillus


MCQ 176: Bacteria have single chromosome, this means they are

        A. diploid
        B. haploid
        C. monoid
        D. tetroid


MCQ 177: A very dormant and thick-walled structure which is produced by direct fusion of hyphae is called

        A. basidiospore
        B. zygospore
        C. spores
        D. ascospore


MCQ 178: In the absence of a male gamete in plants, a diploid cell of ovule develops into a functional embryo through the process of

        A. parthenogenesis
        B. apomixis
        C. budding
        D. haploid parthenogenesis


MCQ 179: Bud initiation in shoots in promoted by

        A. auxin
        B. gibberellins
        C. cytokinin
        D. ethane


MCQ 180: Chlorophyll (a) can absorb the wavelength of light

        A. blue-red
        B. blue-green
        C. yellow green
        D. yellow blue


MCQ 181: Menstruation stage lasts for about

        A. 1-2 days
        B. 3-7 days
        C. 5-10 days
        D. 10-15 days


MCQ 182: In plants, the detection of either light or darkness is the responsibility of

        A. chlorophylls
        B. carotenes
        C. phytochromes
        D. xanthophylls


MCQ 183: A thin flexible spiral is known as a spirochete

        A. vibrio
        B. Spirrilum
        C. spirochete
        D. baccili


MCQ 184: The movement of stomata are maintained by

        A. water
        B. oxygen
        C. stoma
        D. hormones


MCQ 185: The no. of pairs of cranial nerves in humans is

        A. 10
        B. 13
        C. 12
        D. 15


MCQ 186: If the division of cell takes place in three planes it will produce a cube of 8 cocci which is named as

        A. tetrad
        B. sarcina
        C. spiral
        D. helical


MCQ 187: Excessive rapid electric discharge in the gray matter occurs in

        A. parkinson's disease
        B. epilepsy
        C. Alzheimer's disease
        D. tetanus


MCQ 188: Incipient plasmolysis is the stage when plasmolysis

        A. end
        B. transit
        C. about to start
        D. ceases


MCQ 189: The sequence of amino acids in DNA can be determined by the order of

        A. mRNA
        B. tRNA
        C. rRNA
        D. nucleotides


MCQ 190: In the presence of hypo osmotic body fluids, the inhibition occurs in the production of the hormone

        A. antidiuretic
        B. diuretic
        C. aldosterone
        D. adrenaline


MCQ 191: Amphibians are poikilothermic, therefore they use to hibernate in

        A. winter
        B. summer
        C. autumn
        D. spring


MCQ 192: In the word Lysosoma, 'lyso' means splitting and 'soma' means

        A. cell
        B. body
        C. tissue
        D. organic


MCQ 193: Production of leaves and flowers is due to

        A. lateral meristems
        B. intercalary meristems
        C. apical meristems
        D. cortex


MCQ 194: An internal factor that influences growth in plants is

        A. hormones
        B. water
        C. nutrition
        D. all of above


MCQ 195: The embryo of Taenia is inside the egg and contain a chitinous hook that is in number

        A. 6
        B. 7
        C. 5
        D. 9


MCQ 196: The major source of high protein food and oil are the special feature of the plant, that belong to

        A. Fabaceae
        B. Rosaceae
        C. Solanaceae
        D. Jessanaceae


MCQ 197: The glycolate is converted into glycine within

        A. ribosome
        B. mitochondria
        C. peroxisomes
        D. axioms


MCQ 198: Pseudopodia is the specialized cytoplasmic projections which are the attribute of

        A. paramecium
        B. Amoeba
        C. hydra
        D. chlamydomonas


MCQ 199: An example of marine colonial that exhibits alternation of generations is

        A. star fish
        B. Obelia
        C. jelly fish
        D. sea urchin


MCQ 200: The number of capsid in a virus of the common cold is

        A. 252
        B. 535
        C. 250
        D. 525


MCQ 201: Phagocytosed food is digested with the help of enzymes which are present in

        A. ribosome
        B. lysosomes
        C. mitochondria
        D. Golgi complex


MCQ 202: The lysosomes which eat the parts of their cell in a state of starvation are called

        A. auto phagosomes
        B. auto phagocytosis
        C. auto retarded
        D. auto destruction


MCQ 203: In a coordination system, Endocrine glands are

        A. faster than nervous system
        B. glands with ducts
        C. ductless glands
        D. outside the body


MCQ 204: The directed movements either towards or away from a stimulus are called

        A. taxes
        B. kinesis
        C. reflex
        D. instinct


MCQ 205: Thyroxine hormone belongs to the family

        A. amino acid and derivatives
        B. proteins
        C. polypeptides
        D. steroids


MCQ 206: Way of removing pollutants or toxic waste from the environment with the help of living organisms is called

        A. degradation
        B. bioremediation
        C. integrated disease management
        D. disease control


MCQ 207: In the restricted supply of water, the principal function of the body is to conserve

        A. salts
        B. nutrients
        C. oxygen
        D. water


MCQ 208: The outer covering of vacuole is called

        A. tonoplast
        B. chloroplast
        C. epidermis
        D. sapwood


MCQ 209: Phosphoric acid can be joined with the OH group of a pentose sugar with the help of

        A. phosphodiester bond
        B. ionic bond
        C. covalent bond
        D. ester linkage


MCQ 210: The shape of poliovirus is

        A. cylindrical
        B. spherical
        C. round
        D. oval


MCQ 211: Proteins are classified into two groups, i.e. Fibrous proteins and

        A. glandular proteins
        B. globular proteins
        C. Enzymatic proteins
        D. Storage proteins


MCQ 212: In plants, which of the following are large and conspicuous?

        A. male cones
        B. cones
        C. female cones
        D. neutral cones


MCQ 213: The scientist who studies fungi are called

        A. hyphae specialist
        B. fungi cists
        C. mycologists
        D. virologist


MCQ 214: A single mycelium is capable of producing new hyphae in only one day which is up to a

        A. kilometer
        B. meter
        C. micrometer
        D. decimeter


MCQ 215: In the animal kingdom types of the nervous system are

        A. one
        B. three
        C. two
        D. four


MCQ 216: Substances are allowed to pass through the cell membrane to maintain a constant

        A. concentration
        B. gradient
        C. temperature
        D. Ph


MCQ 217: Receptors which produce the sensation of pain are

        A. Thermoreceptors
        B. Chemoreceptors
        C. Mechanoreceptors
        D. Nociceptors


MCQ 218: Synthesis of cytoplasm and cell wall material takes place during

        A. maturation
        B. cell division
        C. elongation
        D. differentiation


MCQ 219: The internal lining of the uterus wall is called

        A. endometrium
        B. peritoneum
        C. epithelium
        D. edothelium


MCQ 220: The sudden physical trauma to the spine while bending or lifting heavy weight can lead to

        A. rickets
        B. herniation
        C. realignment
        D. kwashiorkor


MCQ 221: The juxtamedullary nephrons are specialized for the production of

        A. urea
        B. concentrated urine
        C. uric acid
        D. ammonia


MCQ 222: RNA is synthesized from DNA by the process of

        A. translation
        B. transcription
        C. transgenic
        D. duplication


MCQ 223: In Lily and Maize, the stomata are present in

        A. upper epidermis
        B. lower epidermis
        C. anthroma
        D. central cortex


MCQ 224: Diabetes insipidus is caused by a lack of

        A. oxytocin
        B. thyroxine
        C. vasopressin
        D. steroids


MCQ 225: If the kidney is completely lost and unable to eliminate nitrogenous waste, it leads to

        A. chronic renal failure
        B. chronic liver failure
        C. chronic respiratory failure
        D. chronic pancreas failure


MCQ 226: The hard yellow plaque of lipoid which is found in the innermost layer of the arteries is called

        A. carcinomas
        B. pace maker
        C. atheroma
        D. atherosclerosis


MCQ 227: Acetabularia is a kind of which?

        A. fungi
        B. protist
        C. multicellular alga
        D. unicellular alga


MCQ 228: The oxygen which is released during the process of photosynthesis comes from

        A. hydrogen
        B. leaves
        C. water
        D. oxygen


MCQ 229: The floral characteristics of flower in Solanaceae are

        A. bisexual
        B. monosexual
        C. asexual
        D. heterosexual


MCQ 230: Light exerts its influence on living organisms through variations in day length called

        A. biorhythm
        B. photoperiod
        C. vernalisation
        D. regeneration


MCQ 231: The detection of vibration of the ground by terrestrial vertebrates is because of the receptors in

        A. muscles
        B. Joints
        C. bones
        D. cartilage


MCQ 232: Fibers from the eyes terminate in which part of the brain?

        A. touch area
        B. smell area
        C. visual cortex
        D. sound detection


MCQ 233: The cervical vertebrae are 7 in number and lie in the region of

        A. thoracic
        B. pelvic
        C. neck
        D. medulla


MCQ 234: During the breeding condition, a male three-spined stickleback fish has a

        A. blue belly
        B. white belly
        C. yellow belly
        D. red belly


MCQ 235: The phenomena that some cells evoke a specific developmental response in other cells is

        A. embryonic influence
        B. embryonic induction
        C. embryonic stimulation
        D. embryonic dominance


MCQ 236: The notochord is one of the few prominent structural features in the chick embryo of about

        A. 15 hours
        B. 18 hours
        C. 13 hours
        D. 10 hours


MCQ 237: The numerous small branches which end blindly in the body of planarian are called

        A. septum
        B. caecae
        C. mouth
        D. pharynx


MCQ 238: Fluid Mosaic Model favors that cell membrane contains proteins which are embedded in the fashion of

        A. zigzag
        B. crisscross
        C. mosaic
        D. eplic


MCQ 239: Egg or oosphere is found bedded in a cushion of the thallus in

        A. pith
        B. tail
        C. head
        D. venter


MCQ 240: The phases of the Calvin cycle involves

        A. carbon fixation
        B. reduction
        C. regeneration
        D. all of above


MCQ 241: Acetabularia Mediterranea has a cap of

        A. regular shape
        B. circular shape
        C. triangular shape
        D. cone shape


MCQ 242: The ribs are elevated when the muscles between ribs are

        A. relaxed
        B. contracted
        C. dilated
        D. expanded


MCQ 243: Steep diffusion gradient is maintained by

        A. diffusion
        B. respiration
        C. ventilation
        D. transpiration


MCQ 244: Anabolism and catabolism are the types of

        A. chemical reaction
        B. chain reactions
        C. metabolism
        D. complex reactions


MCQ 245: The skeleton of sponges is composed of needle-like structures called

        A. spicules
        B. ostia
        C. osculum
        D. spongecoel


MCQ 246: The disease of vascular lesions in the epithelial layers of ectodermal tissues are formed in mouth or skin is known as

        A. Herpes simplex
        B. Influenza
        C. Polio
        D. Mumps


MCQ 247: The end or complete stop of the menstrual cycle is called

        A. menuend
        B. infertilization
        C. menopause
        D. ovulation


MCQ 248: The major constituent of hemoglobin receives iron from

        A. liver
        B. bolus
        C. chyme
        D. lungs


MCQ 249: The clock in a plant for measuring the duration of darkness is provided by the rate of conversion of

        A. p660-p730
        B. p700 to p730
        C. p730 to p660
        D. p630 to p700


MCQ 250: A person who forgets the name of a neighbor who visits daily might be suffering from

        A. Alzheimer's disease
        B. parkinson's disease
        C. epilepsy
        D. genu valgum


MCQ 251: Growth of multicellular plant is divided into

        A. one phase
        B. two phases
        C. three phases
        D. four phases


MCQ 252: Another vital function of cambium cork is the formation of tissues over a wound called

        A. heart wood
        B. sap wood
        C. callus
        D. bark


MCQ 253: Tasmania wolf found in Australia belong to the class Metatheria and termed as

        A. marsupials
        B. reptiles
        C. mammals like reptiles
        D. amphibians


MCQ 254: Flagellates which are found in the gut of termite and digest dry wood are called

        A. dichonymphus
        B. trichonymphas
        C. teranymphas
        D. quadronymphus


MCQ 255: The glandular epithelial envelope which secretes calcareous shell is called

        A. chitin
        B. exoskeleton
        C. mantle
        D. core


MCQ 256: Majority of bacteria possesses a unique macromolecule known as

        A. glycan
        B. glycogen
        C. peptidoglycan
        D. peptoglycan


MCQ 257: The special organelle which plays an important role in the regulation of water in freshwater ciliates is called

        A. nucleus
        B. contractile vacuole
        C. mitochondria
        D. centrioles


MCQ 258: In plants, growth and development involve

        A. cell division
        B. elongation
        C. differentiation
        D. all of above


MCQ 259: The chemical composition of an acylglycerol is esters of fatty acids and

        A. bases
        B. alcohol
        C. water
        D. acids


MCQ 260: The digestive system of nematodes have two openings and in the form of

        A. alimentary canal
        B. digestive tract
        C. neuron
        D. muscles


MCQ 261: The weight of the kidney concerning the total mass of the body is by

        A. 0.01
        B. 0.02
        C. 0.1
        D. 0.12


MCQ 262: Absence of a centralized nervous system in hydra is because of

        A. absence of a head
        B. absence of a brain
        C. absence of a nerve cord
        D. all of above


MCQ 263: Bacteria which lack flagella is known as

        A. Atrichous
        B. peritrichous
        C. Amphitrichous
        D. autotrophic


MCQ 264: Special hyphal tips which absorb nutrients from the host in parasitic fungi are called

        A. rhizoids
        B. haustoria
        C. mycelium
        D. typhal


MCQ 265: The sensory receptors of the exoskeleton are called as

        A. sensilla
        B. bristles
        C. lenses
        D. effectors


MCQ 266: In photosynthesis carbon dioxide, light and water are

        A. reactants
        B. products
        C. by-products
        D. catalysts


MCQ 267: Medicago Sativa Alfalfa is one of the world's best forage crop for

        A. horses
        B. donkeys
        C. cows
        D. reindeer


MCQ 268: Clitoria Ternatea is used against

        A. jelly fish
        B. snake bite
        C. mosquito bite
        D. dog attack


MCQ 269: The chains of cells which are surrounded by the mucilaginous sheet are called

        A. trichomes
        B. dichomes
        C. tetrachomes
        D. tetrad


MCQ 270: The microorganisms secrete an enzyme which helps in the digestion of cellulose known as

        A. cellulase
        B. catalase
        C. sucrase
        D. pepsin


MCQ 271: The synthesis and maturation of phage along with the release of new phages constitutes the cycle called

        A. lysis cycle
        B. life cycle
        C. lytic cycle
        D. liptical cycle


MCQ 272: The derivatives of phosphatidic acid, which are composed of glycerol, fatty acids, and phosphoric acids are known as

        A. phospholipids
        B. acylglycerols
        C. triglycerides
        D. esters


MCQ 273: Somites are compact cell masses lying immediately lateral to

        A. neural folds
        B. neural plate
        C. neural groove
        D. yolk


MCQ 274: The regional temperature differences within an animal are obtained by

        A. vasodilatation only
        B. vasoconstriction only
        C. vasocirculation
        D. vasodilation and vasocontriction


MCQ 275: Enzyme activity can be blocked or retarded on a minute disturbance in

        A. density
        B. optimum ph
        C. temperature
        D. concentration


MCQ 276: Euglena and Amoeba belongs to the kingdom

        A. protoctista
        B. protozoa
        C. monera
        D. plantae


MCQ 277: The mesoderm cells migrate medially and caudally from both sides and create a midline thickening called

        A. primitive groove
        B. primitive ridge
        C. primitive pit
        D. primitive streak


MCQ 278: The major difference between animal and plant is in their

        A. digestion
        B. respiration
        C. locomotion
        D. egestion


MCQ 279: There is no genetically engineered vaccine available for

        A. Hepatitis C Virus (HCV)
        B. Hepatitis B Virus (HBV)
        C. Hepatitis A Virus (HAV)
        D. Hepatitis E Virus (HEV)


MCQ 280: The short narrow tube inside the body of cockroach is called

        A. rectum
        B. hepatic caecae
        C. mesentron
        D. crop


MCQ 281: The function of detoxifying harmful drugs from the body is done by

        A. smooth endoplasmic reticulum
        B. rough endoplasmic reticulum
        C. smooth exoplasmic reticulum
        D. rough exoplasmic reticulum


MCQ 282: A complex of interactions of reactions involving elements and molecules constitutes a

        A. bacteria
        B. virus
        C. living organism
        D. dead plants


MCQ 283: The serum which contains antibodies is called

        A. antigens
        B. antiserum
        C. antibodies
        D. globulin


MCQ 284: Experience has an obvious influence on the

        A. instinctive behavior
        B. innate behavior
        C. taxes
        D. learning behavior


MCQ 285: The exchange of gases in leaves is accelerated by the wet surfaces of

        A. root
        B. stem
        C. bark
        D. leaf


MCQ 286: The digestive system of sharks and rays is

        A. L-shape
        B. J-shape
        C. U-shape
        D. O-shape


MCQ 287: Ringworm and skin diseases can be cured with the help of leaves of

        A. pine tree
        B. cassia alata
        C. conifers
        D. date tree


MCQ 288: Certain very precise environmental cues are required for

        A. seed dormancy
        B. pollination
        C. seed germination
        D. seed formation


MCQ 289: Four postulates were given by Robert Koch in the

        A. Germ theory of disease
        B. Disease Theory
        C. Germs Theory
        D. Four Postulate theory


MCQ 290: The membrane potential of a non-conducting or resting neuron is

        A. 70mV
        B. 60 mV
        C. 50 mv
        D. 30 mV


MCQ 291: In reproduction, Amniotic sac is filled with fluid for

        A. protection only
        B. shock absorption only
        C. nutrition
        D. protection and shock absorption


MCQ 292: The plant's body which is composed of a large number of ridges and furrows along with a rough stem is

        A. sphenopsida
        B. hepaticopsids
        C. lycopsida
        D. bryopsida


MCQ 293: Smooth muscles are not under

        A. voluntary control
        B. spontaneous control
        C. conscious control
        D. involuntary control


MCQ 294: The conducting tissues which help in transportation are

        A. xylem only
        B. phloem only
        C. roots
        D. xylem and phloem


MCQ 295: The homeostatic thermostat which facilitates the process of thermoregulation in man is present in

        A. cerebrum
        B. thalamus
        C. hypothalamus
        D. medulla


MCQ 296: The ammonia is converted into the less toxic product in the restricted supply of water which is

        A. urea
        B. ammonia
        C. uric acid
        D. urine


MCQ 297: In chick, the shell of the egg is secreted as the egg passes through the

        A. uterus
        B. ureter
        C. oviduct
        D. ovary


MCQ 298: Maurice Wilkins and Rosalind Franklin determine the structure of DNA using a technique called

        A. X-ray Diffraction
        B. X-ray Refraction
        C. X-ray Reflection
        D. Y-ray Refraction


MCQ 299: The capacity of lungs while sleeping for gaseous exchange is

        A. 4 liters
        B. half liters
        C. 2 liters
        D. 6 liters


MCQ 300: The marginal area of the blastoderm in which the cells remain undetached from the yolk is called

        A. primitive groove
        B. zone of junction
        C. area pellucida
        D. area opaca


MCQ 301: Zea mays and corns belong to the family name

        A. Rosaceae
        B. Acacia
        C. Poaceae
        D. Solanaceae


MCQ 302: In hyponasty, the bud will remain

        A. close
        B. open
        C. semi-open
        D. wilt


MCQ 303: The special ring of the muscle which is present between esophagus and stomach is called

        A. esophageal sphincter
        B. cardiac sphincter
        C. pyloric sphincter
        D. colonal sphincter


MCQ 304: The finger-like process which has a blind end in the caecum is called

        A. rectum
        B. appendix
        C. lumen
        D. intestine


MCQ 305: The blood of arthropods is colorless due to lack of

        A. hemoglobin
        B. immunoglobin
        C. chromatin
        D. iron


MCQ 306: Oxygenated blood is never received by the heart of

        A. frog
        B. fish
        C. reptiles
        D. arthropods


MCQ 307: Hormone production is a function related to

        A. hypothalamus
        B. pons
        C. hippocampus
        D. medulla


MCQ 308: Messages from the central nervous system to effector is transferred through

        A. sensory neurons
        B. motor neurons
        C. relay neurons
        D. associative neurons


MCQ 309: Follicle Stimulating Hormone (FSH) stimulates the development of

        A. several primary follicles
        B. several interstitial cells
        C. oocytes
        D. ovum


MCQ 310: Lipids which are fats and oils are lighter than water, therefore, have a specific gravity of about

        A. 0.6
        B. 0.8
        C. 0.9
        D. 0.1


MCQ 311: Secretin is produced from which one of the following?

        A. ileum
        B. duodenum
        C. rectum
        D. jejunum


MCQ 312: The protection against sudden thermal change is carried out by the help of

        A. water
        B. salt
        C. ions
        D. bonds


MCQ 313: The nitrogenous wastes are in the form of

        A. uric acid
        B. ammonia
        C. urea
        D. all of above


MCQ 314: After fertilization, the ovule is called a

        A. fruits
        B. seed
        C. embryo
        D. zygote


MCQ 315: Blood is sometimes retained in the heart or lungs due to malfunctioning activity of heart-pumping which can lead to fatal condition is called

        A. Angina attack
        B. Heart failure
        C. Cardiac arrest
        D. Congestive heart failure


MCQ 316: A harmful molluscum which is injurious to gardens and cultivations is termed as

        A. oyster
        B. octopus
        C. feredo
        D. slug


MCQ 317: Apical meristems play an important role in

        A. secondary growth
        B. lateral growth
        C. primary growth
        D. pre-primary growth


MCQ 318: Cell elongation is retarded by

        A. ultraviolet rays only
        B. blue light only
        C. red light
        D. ultraviolet rays and blue light


MCQ 319: Spemann performed experiments to understand the concept of

        A. growth
        B. development
        C. differentiation
        D. selection


MCQ 320: Amino acids are composed of

        A. carbon, nitrogen and oxygen
        B. carbon, oxygen and sulfur
        C. carbon, oxygen and hydrogen
        D. carbon, oxygen, hydrogen and nitrogen


MCQ 321: Temperature and concentration of salts and water is retained in

        A. phagocytosis
        B. hemolytic
        C. homeostasis
        D. fluid retention


MCQ 322: In kingdom Animalia, Daphnia belongs to the class

        A. Arachnida
        B. Myriapodia
        C. Crustacean
        D. Plantae


MCQ 323: Virus synthesizes its self and then transfer itself by using biosynthetic machinery of

        A. itself
        B. bacteria
        C. host
        D. cell


MCQ 324: The most abundant carbohydrate which is found in nature is

        A. fructose
        B. glycogen
        C. cellulose
        D. pectin


MCQ 325: Fats are solid due to the presence of

        A. Saturated fatty acids
        B. unsaturated fatty acid
        C. glycerols
        D. ester bond


MCQ 326: RuBP is a molecule which acts as a/an

        A. donator
        B. acceptor
        C. transporter
        D. medium


MCQ 327: The leaf which bears sporangia is known as

        A. sori
        B. sporophyll
        C. sporing
        D. chlorophyll


MCQ 328: Bolting of some rosette plants is promoted by

        A. ethane
        B. gibberellins
        C. auxin
        D. Cytokinins


MCQ 329: There is a chemical link between anabolism and catabolism in the form of

        A. Adenosine Diphosphate (ADP)
        B. Adenosine triphosphate(ATP)
        C. carbon-hydrogen
        D. carbon-oxygen


MCQ 330: Rhizopus black bread mold undergoes sexual reproduction and produce

        A. Ascospores
        B. spores
        C. zygospores
        D. basidiospores


MCQ 331: All animals of Grade bilateria are

        A. problastic
        B. diploblastic
        C. triploblastic
        D. monoblastic


MCQ 332: The follicle cells after the release of an egg are modified to form a special structure called

        A. cell debris
        B. corpus luteum
        C. endometrium
        D. epididymis


MCQ 333: The primitive form of reproduction not involving any union of gametes is

        A. sexual reproduction
        B. asexual reproduction
        C. syngenesis
        D. sexual generation


MCQ 334: Mad cow infection and mysterious brain infections are being reported assuming the response is a

        A. virions
        B. viruses
        C. bacteria
        D. prions


MCQ 335: Heartbeat rate, blood pressure, and digestive tract mobility is increased by

        A. thyroxine
        B. nicotine
        C. steroids
        D. epinephrine


MCQ 336: Reserve food material in cyanobacteria is

        A. proteins
        B. sugar
        C. peptidoglycan
        D. glycogen


MCQ 337: The metabolites of nitrogenous nature are eliminated from the body by a process

        A. absorption
        B. reabsorption
        C. excretion
        D. transpiration


MCQ 338: The exchange of gases in respiration is only done by

        A. osmosis
        B. diffusion
        C. transport
        D. movement


MCQ 339: Gray vegetal cytoplasm gives rise to

        A. brain
        B. gut
        C. liver
        D. kidney


MCQ 340: A neuron at rest is electrically

        A. more positive outside
        B. more negative outside
        C. neutral
        D. may be positive or negative outside


MCQ 341: Bryophytes need water for their reproduction and hence can't live without water so they are called

        A. amphibians
        B. Amphibians of plants
        C. water molds
        D. hydro bryophytes


MCQ 342: Retroviruses can convert a single-stranded RNA genome into double-stranded viral DNA by a special enzyme

        A. Transcriptase
        B. Reverse transcriptase
        C. Auto Transcriptase
        D. Catalase


MCQ 343: The overall chemical reaction that takes place within a cell are collectively called as

        A. metabolism
        B. anabolism
        C. complex reaction
        D. catabolism


MCQ 344: A family which has about 100 genres and 2000 species is

        A. rosaceae
        B. cassia
        C. papilionaceae
        D. apocynaceae


MCQ 345: From Hansen's node dorsal mesoderm is formed and is organized into

        A. mollicutes
        B. axons
        C. somites
        D. dendrites


MCQ 346: The gradual osmotic flow from filtrate back into the kidney as it moves down in loop of henel is via the mechanism of

        A. counter current multiplier
        B. current multiplier
        C. counter multiplier
        D. current counter multiplier


MCQ 347: In the next half-century, the number of people over age 80 will rise from 5 million to

        A. 10 million
        B. 12 million
        C. 14 million
        D. 16 million


MCQ 348: The Golgi apparatus is found virtually in all the cells which are in nature

        A. prokaryotic
        B. eukaryotic
        C. protozoans
        D. protoctists


MCQ 349: In which of the following Cytoplasm plays a role

        A. selection of genes
        B. repairing of genes
        C. aggregation of denes
        D. recombination of genes


MCQ 350: Afferent lymph vessels are numerous, and efferent lymph vessel is

        A. single
        B. double
        C. triple
        D. quadro


MCQ 351: After maturation of neurons they

        A. divide until death
        B. don't divide any further
        C. divide only once
        D. divide even after death


MCQ 352: Corticosterone belongs to the group

        A. glucocorticoid only
        B. mineralocorticoid only
        C. steroids
        D. glucocorticoid and mineralocorticoid


MCQ 353: The process in which infections becomes incorporated into bacterial chromosome instead of taking control of the host's machinery is termed as

        A. progeny
        B. lysogeny
        C. isogeny
        D. metageny


MCQ 354: The removal of apex releases the lateral buds from apical dominance it is called

        A. inhibitory effect
        B. compensatory effect
        C. promoting effect
        D. supporting effect


MCQ 355: Campylobacter requires a very low concentration of oxygen for growth, therefore, it is known as

        A. microaerophillic
        B. macroaerophilic
        C. aerobic
        D. anaerobic


MCQ 356: The animals which absorb heat from surrounding are called as

        A. endotherms
        B. ectotherms
        C. heterotherms
        D. hypotherms


MCQ 357: In the digestive system, bile is secreted by

        A. duodenum
        B. jejunum
        C. ileum
        D. liver


MCQ 358: The reticular formation is important in screening

        A. input information
        B. output information
        C. both input and output information
        D. neutral information


MCQ 359: To start an impulse in the next neuron, it may take

        A. one impulse from another neuron
        B. two-three impulses from another neuron
        C. three-four impulses from another neuron
        D. five to six impulses from another neuron


MCQ 360: In higher plants, the entire plant body is not capable of growing but growth is limited to certain regions known as

        A. growing points
        B. meristems
        C. cortex
        D. pith


MCQ 361: The most complex also the most abundant carbohydrates that are found in nature are

        A. monosaccharide
        B. disaccharides
        C. polysaccharides
        D. Oligosaccharides


MCQ 362: Intercalary meristems are located at the base of

        A. internodes
        B. nodes
        C. elongation zone
        D. flower


MCQ 363: The tail of stingray can inflict very dangerous wounds by its

        A. fins
        B. gills
        C. sharp jaws
        D. sharp spines


MCQ 364: The anterior end of the digestive system is mouth and posterior end is

        A. mouth
        B. ostia
        C. annus
        D. stomach


MCQ 365: The development of secondary male characteristics is caused by

        A. oestrogen
        B. androgens
        C. aldosterone
        D. steroids


MCQ 366: The known species of plants are

        A. 400000
        B. 360000
        C. 260000
        D. 200000


MCQ 367: The wavelength of visible light ranges between

        A. 360-678
        B. 380-750
        C. 280-670
        D. 380-700`


MCQ 368: The molecule of chlorophyll is composed of

        A. hydrophilic head only
        B. tail only
        C. hydrophilic joint
        D. hydrophilic head and tail


MCQ 369: Saliva is secreted by which glands?

        A. salivary glands
        B. sublingual glands
        C. sub maxillary glands
        D. all of above


MCQ 370: The generation of turgor pressure is done by the high osmotic pressure of

        A. cell wall
        B. cell membrane
        C. cell vacuole
        D. cell sap


MCQ 371: Diatoms are major producers and form aquatic

        A. food
        B. oxygen
        C. food chain
        D. silicates


MCQ 372: The smallest particles of light are called

        A. dust
        B. protons
        C. photons
        D. positrons


MCQ 373: Acetylcholine and adrenaline are

        A. enzymes
        B. neuro-transmitters
        C. nitrogenous bases
        D. ions


MCQ 374: The carriers in the cell membrane which transport nutrients in plants are

        A. soil
        B. stomata
        C. roots
        D. proteins


MCQ 375: Hypertonic environment results in loss of water and ultimately the cell

        A. die
        B. wilt
        C. shrink
        D. turgid


MCQ 376: Melanocytes in the skin produce pigments that are

        A. black in color
        B. yellow in colour
        C. brown in colour
        D. white in colour


MCQ 377: The layer of connective tissue which surrounds the synovial joints is called

        A. ligament
        B. fibrous capsule
        C. synovial capsule
        D. tendon


MCQ 378: The part of apical meristem which gets separated from apex by permanent tissues are called

        A. apical meristem
        B. intercalary meristems
        C. lateral meristems
        D. apical tissue


MCQ 379: Smaller fibers which carry nerve impulse towards cell body are called

        A. roots
        B. dendron
        C. dendrites
        D. strands


MCQ 380: The fertilized egg of an ascidian contains cytoplasm of

        A. one colour
        B. four different colors
        C. three different colors
        D. five different colors


MCQ 381: Reproduction is mainly divided into how many types?

        A. two types
        B. three types
        C. four types
        D. five types


MCQ 382: In humans, the ovary releases what at one time only?

        A. two ovum
        B. one ovum
        C. one polar body
        D. one oocyte


MCQ 383: The chlorophyll which is found in photosynthetic bacteria is known as

        A. bacteriphylls
        B. bacteriochlorophylls
        C. bacteriophtosynthetic
        D. bacteriophage


MCQ 384: The increase muscles contraction along with the increasing rate of heat production is called

        A. shivering thermogenesis
        B. non-shivering thermogenesis
        C. overlapping hypogenesis
        D. underweighted osmogenesis


MCQ 385: The parasitic fungus which destroys wheat plant is

        A. Puccinia
        B. cascuta
        C. leech
        D. lice


MCQ 386: The epicuticle is the exoskeleton is made up of

        A. lipoprotein
        B. chitin
        C. polysaccharide
        D. fructolipase


MCQ 387: The epiblast is mainly presumptive

        A. ectoderm only
        B. mesoderm only
        C. endoderm
        D. ectoderm and mesoderm


MCQ 388: Myxomycota is also termed as

        A. fungus
        B. molds
        C. water molds
        D. slime molds


MCQ 389: Osmoregulators excrete salts through

        A. fins
        B. gills
        C. bladder
        D. scales


MCQ 390: Thylakoid membrane produces ATP by the process of

        A. photosynthesis
        B. chemiosmosis
        C. chemosynthesis
        D. respiration


MCQ 391: Secretion of saliva by dogs on ringing the bell just before giving them food is an example of

        A. conditioning
        B. learning
        C. taxes
        D. imprinting


MCQ 392: Both adrenaline and nor-adrenaline are secreted in situations of

        A. pleasure
        B. hunger
        C. stress
        D. thirst


MCQ 393: The dense network which are repeated divisions of arterioles are

        A. veins
        B. capillaries
        C. arteries
        D. venule


MCQ 394: In cockroach, the rectum reabsorbs maximum salts and water hence excretory products are in the form of

        A. urea
        B. uric acid
        C. ammonia
        D. urine


MCQ 395: Touch me not (Mimosa Pudica) belong to the family

        A. Acacia
        B. Solanaceae
        C. Rosaceae
        D. Pistacia


MCQ 396: Between ectoderm and endoderm, there is a jelly-like

        A. medusae
        B. mesoglea
        C. cytoplasm
        D. water


MCQ 397: The events of the menstrual cycle involve the

        A. ovarian cycle only
        B. uterine cycle only
        C. ovulatory cycle
        D. ovarian and uterine cycle


MCQ 398: Liverworts belong to a subdivision of bryophytes called as

        A. hepaticopsida
        B. anthoceropsida
        C. bryopsida
        D. ectosida


MCQ 399: The stomach is the organ of food digestion, therefore, secretes an enzyme which helps in digestion known as

        A. bile
        B. pancreatic juice
        C. gastric juice
        D. no enzyme


MCQ 400: Tri-iodothyronine in its structure contains

        A. one iodine atom
        B. two iodine atoms
        C. three iodine atoms
        D. four iodine atoms


MCQ 401: Long term memory is formed in which part of the brain?

        A. amygdala
        B. hippocampus
        C. thalamus
        D. pons


MCQ 402: Most of the major organs of the human embryo are formed in which week of pregnancy?

        A. 16
        B. 15
        C. 14
        D. 12


MCQ 403: The process of photosynthesis cannot occur in the absence of

        A. oxygen
        B. carbon dioxide
        C. carbon monoxide
        D. nitrogen


MCQ 404: The muscles of annelids which are arranged along the length of the body are called

        A. smooth muscles
        B. longitudinal muscles
        C. latitudinal muscles
        D. rough muscles


MCQ 405: The non-protein part of an enzyme is called

        A. coenzyme
        B. cofactor
        C. substrate
        D. activator


MCQ 406: Medulla, pons, and cerebellum make up

        A. forebrain
        B. midbrain
        C. hindbrain
        D. spinal cord


MCQ 407: The hormone that controls the release of thyrotrophin releasing factor from the hypothalamus is

        A. oxytocin
        B. thyroxine
        C. oestrogen
        D. testosterone


MCQ 408: Fungi can tolerate a range of PH from 2 to

        A. 9
        B. 8
        C. 6
        D. 7


MCQ 409: Those tubular membranes which separate the material of endoplasmic reticulum are called

        A. chromatids
        B. cisternae
        C. tubular membranes
        D. tubules


MCQ 410: Overactivity of parathormone would lead to a progressive

        A. muscular tetany
        B. demineralization of bones
        C. rickets
        D. arthritis


MCQ 411: Lichens are examples of which of the following group?

        A. thallophytic
        B. autotrophic
        C. saprophytic
        D. symbiotic


MCQ 412: According to Erwin Chargoff analysis, the ratio of adenine and thiamine is

        A. equal
        B. unequal
        C. less
        D. more


MCQ 413: Lipids are found in which?

        A. Oil, waxes, fats
        B. cholesterol, sugar, egg
        C. fats, glucose, starch
        D. animals' starch


MCQ 414: The cavity between the yolk and the endodermis called

        A. gastrocoele
        B. coelom
        C. blastocoele
        D. neurocoele


MCQ 415: The estrous cycle is found in all mammals except

        A. dogs
        B. cats
        C. humans
        D. bears


MCQ 416: Most of the glycogens upon mixing with iodine gives a color which is

        A. blue
        B. red
        C. green
        D. pink


MCQ 417: Class Hirudinea have additional markings on their body which are called

        A. palpls
        B. suckers
        C. serae
        D. annuli


MCQ 418: A neuron has a fiber that carries impulse towards the cell body called

        A. node
        B. Dendron
        C. fiber
        D. root


MCQ 419: The mass of pituitary gland in man is about

        A. 10 gm
        B. 1 gm
        C. 0.5 gm
        D. 3 gm


MCQ 420: The starches which have unbranched chains and are only soluble in hot water are

        A. Amylose starches
        B. amylopectin starches
        C. glucose starch
        D. pectin starch


MCQ 421: The process of production of identical copies of organisms asexually is

        A. tissue culturing
        B. vitro-fertilization
        C. cloning
        D. transgenic organisms


MCQ 422: The morula stage changes into

        A. gastrula
        B. neurula
        C. interphase
        D. blastula


MCQ 423: The effective temperature considered in vernalization is

        A. around 1 °C
        B. around 4 °C
        C. around 2 °C
        D. around 10 °C


MCQ 424: Cloning will be subjected to serious moral questions if applied to

        A. reptiles
        B. humans
        C. birds
        D. mammals


MCQ 425: The plant which flower without being influenced by photoperiod is a

        A. long day plants
        B. short day plants
        C. day neutral plant
        D. noble plants


MCQ 426: Urea cycle needs two molecules of ammonia and one molecule of carbon dioxide to generate one molecule of

        A. uric acid
        B. urea
        C. ammonia
        D. urine


MCQ 427: The common ectoparasite which attacks both aquatic and terrestrial animals is

        A. lice
        B. flea
        C. leech
        D. aphid


MCQ 428: Lipids have more (C-H) bonds and less oxygen, this unique quality allows lipids to perform a key role by

        A. yielding water
        B. giving oxygen
        C. storing energy
        D. providing support


MCQ 429: What does the word Nematoda mean?

        A. pointed ends
        B. pointed bodies
        C. pointed cells
        D. peaked heads


MCQ 430: The cells that elongate lengthwise more than in other direction are

        A. pith
        B. cortex
        C. fibers and tracheids
        D. cambium


MCQ 431: A definite charge bearing site of an enzyme on which a chemical substance attaches itself is called

        A. active site
        B. available site
        C. catalytic site
        D. binding site


MCQ 432: The stored oxytocin and antidiuretic hormone in the posterior lobe is released when they receive nerve impulses from

        A. thalamus
        B. cerebrum
        C. pons
        D. hypothalamus


MCQ 433: The potential source of chemical energy at cellular level comes from the bond between

        A. carbon-oxygen
        B. carbon-hydrogen
        C. oxygen-hydrogen
        D. carbon-carbon


MCQ 434: Gene frequency, gene flow, population density, age distribution, overpopulation are the attributes of

        A. community
        B. population
        C. groups
        D. individuals


MCQ 435: The leaves and petals follow the growth pattern concerning movement is

        A. epinasty
        B. hyponasty
        C. nutation
        D. hypernasty


MCQ 436: Hepatitis B is also known as

        A. Hepatitis C Virus (HCV)
        B. Hepatitis A Virus (HAV)
        C. serum hepatitis
        D. Human Immunodeficiency Virus (HIV)


MCQ 437: Prokaryotic cells have a specialized material with them called as

        A. peptidoglycan/murein
        B. pectin
        C. peptidoglucose
        D. peptidoaminose


MCQ 438: In the gray crescent area, the cytoplasm contains essential information for

        A. growth
        B. development
        C. reproduction
        D. respiration


MCQ 439: Beverages like whiskey are made from Rye, Barley, Corn and Rum molasses which belong to the class

        A. Rosaceae
        B. Poaceae
        C. Solanaceae
        D. Acacia


MCQ 440: The subdivision of trachea into fine thin wall tubules which are called

        A. alveoli
        B. villi
        C. ducts
        D. nephrons


MCQ 441: Echinoderms have a vast number of species which are above

        A. 7000
        B. 8000
        C. 5000
        D. 3000


MCQ 442: The ability to regain or recover the lost or injured part of the body is called

        A. recreation
        B. regeneration
        C. reproduction
        D. reformation


MCQ 443: The animal which uses saliva and urine for cooling is

        A. lizard
        B. cats
        C. bears
        D. bats


MCQ 444: Different cytoplasmic components contain different

        A. morphogenetic determinants
        B. physiological determinants
        C. histologic determinants
        D. anatomic determinants


MCQ 445: The production of only one kind of spores is called

        A. heterospory
        B. homospory
        C. dispory
        D. monospory


MCQ 446: Tobacco is included in the category of

        A. short day plants
        B. long day plants
        C. day neutral plants
        D. neutral plants


MCQ 447: The digestion in amoeba involves the killing and softening of food in a medium which is

        A. basic
        B. acidic
        C. alkaline
        D. neutral


MCQ 448: Elevated levels of nitrogenous wastes can lead to

        A. convulsions
        B. coma
        C. death
        D. all of above


MCQ 449: The nerve ring is found in the pharyngeal region of

        A. molluscus
        B. annelids
        C. echinoderms
        D. arthropods


MCQ 450: The growth of plants is influenced by

        A. intensity of light
        B. quality of light
        C. duration of light
        D. all of above


MCQ 451: The gastrin hormone stimulates the secretion of

        A. pancreatic juice
        B. gastric juice
        C. hydrochloric acid
        D. mucus


MCQ 452: Enzymes, antibodies, hormones, and hemoglobin are examples of

        A. Fibrous proteins
        B. Glandular proteins
        C. Globular proteins
        D. Enzymatic proteins


MCQ 453: The flexible elastic and nonliving matrix collagen are secreted by

        A. chondrocytes
        B. phagocytes
        C. coenocytes
        D. erythrocytes


MCQ 454: Bleeding in plants is due to which?

        A. root pressure
        B. hydrostatic pressure
        C. turgor pressure
        D. translocation stream


MCQ 455: The chick after completing its development is hatched on the

        A. tenth day
        B. twenty first day
        C. eleventh day
        D. thirty first day


MCQ 456: A very useful technique which helps in testing a nutrient's essentiality for plantation is

        A. nutrition culture technique
        B. hydroponic culture technique
        C. hydrophobic culture technique
        D. tissue culture technique


MCQ 457: The female between the age of 12-21 are in fear of getting obese give rise to a disease called

        A. obesity
        B. bulimia nervosa
        C. anorexia nervosa
        D. rickets


MCQ 458: Leaves called fronds are coiled at immature stages this pattern constituted is termed as

        A. circination
        B. frond leaves
        C. circinate vernation
        D. leafless


MCQ 459: The fertilized ovum for further development is implanted in the

        A. cervix
        B. placenta
        C. uterus
        D. ureter


MCQ 460: The bones in-ear of mammals are

        A. Malleus
        B. Ineus
        C. staples
        D. all of above


MCQ 461: Astronauts may utilize the useful technique of hydroponic culture in space to

        A. grow vegetables
        B. sow seeds
        C. preserve milk
        D. grow fruits


MCQ 462: If the movement is toward the stimulus, the response is

        A. positive
        B. negative
        C. no response
        D. neutral


MCQ 463: The storage of food as lipids or glycogen in fungi is done by mycelium

        A. mycelium
        B. hyphae
        C. rhizoids
        D. mucor


MCQ 464: Nissl's granules are groups of

        A. Endoplasmic Reticulum (ER)
        B. Golgi bodies
        C. ribosomes
        D. mitochondria


MCQ 465: A very dangerous species of the parasite which holds villi of the intestine and sucks blood and body fluid is

        A. hook worm
        B. tape worm
        C. molluscus
        D. leech


MCQ 466: The cavity present between the body wall and the elementary canal and lined mesoderm is called

        A. mesoglea
        B. coelom
        C. chitin
        D. flagellum


MCQ 467: The fusion of cytoplasm is known as

        A. plasmogamy
        B. karyogamy
        C. progamy
        D. microgamy


MCQ 468: The gardener find Autumn fallen leaves due to the presence of good

        A. minerals
        B. chlorophyll
        C. salts
        D. sugars


MCQ 469: One of the symptoms of diabetes insipidus is

        A. great itching
        B. nausea
        C. great thirst
        D. depression


MCQ 470: The evidence suggests that birds have been evolved from ancestors of

        A. amphibians
        B. insects
        C. dinosaurs
        D. reptiles


MCQ 471: Plants which live underwater obtain oxygen from dissolved oxygen in water by

        A. concentration gradient
        B. osmosis
        C. diffusion
        D. active transport


MCQ 472: The major components of an immune system include

        A. T-lymphocytes
        B. B-lymphocyte
        C. antibodies
        D. all of above


MCQ 473: In chick of 18 hours, flat thickened area of the ectoderm is seen as

        A. neural folds
        B. neural plate
        C. neural groove
        D. neural tube


MCQ 474: The final size of a given cell type is attained during

        A. maturation
        B. elongation
        C. cell division
        D. differentiation


MCQ 475: Animals have a basic instinct to control heat gain by adjusting their

        A. thermostat
        B. posture
        C. temperature
        D. respiration


MCQ 476: Adenovirus is responsible for the disease

        A. cough
        B. cold
        C. flu
        D. measles


MCQ 477: The drainage capacity of the soil is improved by burrowing activity of

        A. insects
        B. earthworms
        C. snakes
        D. termites


MCQ 478: The softer connective tissue which covers the end of the bone joint is

        A. exoskeleton
        B. compact bone
        C. sponge bone
        D. cartilage


MCQ 479: The condition in which palatine processes of maxilla and palatine fail to fuse and leads to interferences while inhaling food and ultimately causing aspiration pneumonia is

        A. Microcephaly
        B. Arthritis
        C. Cleft palate
        D. Osteoarthritis


MCQ 480: The number of facial bones is

        A. 12
        B. 14
        C. 16
        D. 8


MCQ 481: Parthenocarpy is sometimes artificially induced for commercial purposes in

        A. potato
        B. cabbage
        C. tomato
        D. garlic


MCQ 482: Only one of the follicle continues to grow while all other follicles break down by a process called

        A. follicle suicide
        B. follicle death
        C. follicle atresia
        D. follicle degeneration


MCQ 483: The non-surgical removal of kidney stones is the technique called

        A. Lithotripsy
        B. dialysis
        C. shock waves
        D. none of others


MCQ 484: For soundproofing in buildings which one is used?

        A. fungi
        B. sponges
        C. coral reefs
        D. sea anemone


MCQ 485: The estrogen production stimulates the

        A. endometrium
        B. vascularization of endometrium
        C. inhibition of secretion Follicle Stimulating Hormone (FSH)
        D. all of above


MCQ 486: The interventricular septum is complete along with four chambers of the heart in

        A. crocodiles
        B. amphibians
        C. reptiles
        D. mammals


MCQ 487: Misuse of antibiotic streptomycin can cause

        A. dumb
        B. deafness
        C. mental retardness
        D. memory loss


MCQ 488: In kingdom Plantae, Locopsids is also called

        A. fungus
        B. algae
        C. mosses
        D. ferns


MCQ 489: The evaporating cooling in physiologically adapted animals is done by activation of

        A. lymphatic system
        B. sweat glands
        C. respiration
        D. excretion


MCQ 490: The rasping organ by which snail feed is called

        A. scrape
        B. radula
        C. siphon
        D. anus


MCQ 491: Angiosperms have a special mode of transport via phloem which applies to a theory called

        A. Pressure flow theory
        B. action theory
        C. flow theory
        D. pressure theory


MCQ 492: The absorption of all the products of digestion is done in

        A. duodenum
        B. jejunum
        C. ileum
        D. colon


MCQ 493: Rocky coastlines in the intertidal zone have common algae called

        A. green algae
        B. brown algae
        C. brown green algae
        D. yellow algae


MCQ 494: The strength is given to the cell wall of xylem cells by

        A. lignin only
        B. cellulose only
        C. cell membrane
        D. lignin and cellulose


MCQ 495: The thread-like structures present on the body of fungi is

        A. mycelium
        B. fungus
        C. hyphae
        D. molass


MCQ 496: Soft callus grow in hematoma to clear up

        A. debris
        B. vitamin-D
        C. cartilage
        D. fracture


MCQ 497: An estimated survey reports that 90% of lung cancer is caused by

        A. drinking
        B. smoking
        C. breathing
        D. eating


MCQ 498: The thyroid gland is situated below the

        A. left kidney
        B. larynx
        C. trachea
        D. lungs


MCQ 499: Radiolarian is an example of a unicellular organism and its common name is

        A. antipodes
        B. actipods
        C. actinipods
        D. nematodes


MCQ 500: The functional and structural unit of kidneys is

        A. flame cell
        B. nephrons
        C. neuron
        D. alveoli


MCQ 501: Melanophore stimulating hormone (MSH) is secreted in higher animals during

        A. childhood
        B. puberty
        C. pregnancy
        D. sleep


MCQ 502: The cell membrane is virtually impermeable to all ions except

        A. Mg+
        B. K+
        C. H+
        D. Ca+


MCQ 503: Synchronization of reproductive behavior of plants with their environment is done by

        A. photoperiodism and vernalisation
        B. respiration and vernalisation
        C. transpiration and photoperiodism
        D. respiration and transpiration


MCQ 504: Animals which feed on large pieces of food are called

        A. omnivores
        B. fluid feeders
        C. macrophagous
        D. filter


MCQ 505: A chromosome is composed of a DNA and

        A. lipids
        B. proteins
        C. gene
        D. sugars


MCQ 506: A walnut tree can be saved from the attack of aphid biologically by a parasite

        A. wasp
        B. bee
        C. leech
        D. lice


MCQ 507: Non-vascular plants are also called as

        A. Bryophyta
        B. tracheophyta
        C. chronophyta
        D. alveophyta


MCQ 508: The sepal and petals give protection to the

        A. stamen only
        B. carpel only
        C. filament
        D. stamen and carpel


MCQ 509: The larva which resembles its adult is called

        A. pupa
        B. chrysalis
        C. nymph
        D. mature


MCQ 510: The nucleus of the egg cell in cloning is destroyed by

        A. violet radiations
        B. heat
        C. cold
        D. water


MCQ 511: Collection of responses predetermined by the inheritance of specific nerve is

        A. learned behavior
        B. innate behavior
        C. habituation
        D. imprinting


MCQ 512: A synthesized knowledge of science may have observations which can be qualitative and

        A. deductive
        B. inductive
        C. quantitative
        D. exact


MCQ 513: The body of chordates is divided into an anterior proboscis, collar and

        A. root
        B. trunk
        C. bark
        D. tail


MCQ 514: Primitive ridges are thickened margins of

        A. primitive streak
        B. neural plate
        C. primitive groove
        D. neural tube


MCQ 515: A change in evolution gives rise to the increase in

        A. biodiversity
        B. population
        C. community
        D. geological periods


MCQ 516: The transfer of heat out to the environment is done by

        A. radiation only
        B. evaporation only
        C. vaporisation
        D. radiation and evaporation


MCQ 517: Corpuscles situated deep in the body and receive deep pressure stimulus, are

        A. Pacinian Corpuscles
        B. Meissner's corpuscles
        C. cellular corpuscles
        D. sensory corpuscles


MCQ 518: The body of the tapeworm is a ribbon-like and divided into a segment called

        A. proglottids
        B. plastids
        C. segmented
        D. ribbons


MCQ 519: Under normal circumstances, a patient's immune system can overcome bacterial or viral attack but in AIDS victim is

        A. succumbed
        B. saved
        C. exempted
        D. electrocuted


MCQ 520: The onset of epilepsy is usually before the age of

        A. 20
        B. 30
        C. 10
        D. 15


MCQ 521: Heartbeat can be detected in pulse only by

        A. veins
        B. capillaries
        C. arteries
        D. lymphatic vessels


MCQ 522: The skeletal muscles are attached to the bone by a bundle of collagen and non-elastic fibers called

        A. tendons
        B. filaments
        C. cartilage
        D. hoofs


MCQ 523: The fluid present between the meninges for protection and cushioning of the central nervous system is called

        A. interstitial fluid
        B. cerebrospinal fluid
        C. cytoplasmic fluid
        D. protoplasmic fluid


MCQ 524: The phenomenon of root pressure in which water droplets exude from hydathodes is termed as

        A. guttation only
        B. exudation only
        C. inundation
        D. guttation and exudation


MCQ 525: By the alternation of generations, the spore of a moss develops itself into an alga like structure known as

        A. psilopsida
        B. protonema
        C. marchantia
        D. bryopsida


MCQ 526: When blood starts mixing between two atria and that blood reaches the newborn baby its a disease known as

        A. pink babies
        B. blue babies
        C. abnormal babies
        D. blue infants


MCQ 527: AIDS was first reported for the first time in the early 1980s, in a group of young

        A. females
        B. males
        C. horses
        D. monkeys


MCQ 528: Each muscle fiber is composed of a large number of

        A. myofibrils
        B. fibrils
        C. tendons
        D. ligaments


MCQ 529: Glycogen is found in excess quantity in the animals' liver and

        A. muscles
        B. bones
        C. skin
        D. kidneys


MCQ 530: A group of similar individuals that actually or potentially interbreed in nature is called

        A. community
        B. population
        C. groups
        D. species


MCQ 531: The semi-solid mass which is produced after thoroughly mix up of food and gastric juice is called

        A. bolus
        B. chyme
        C. bile
        D. villus


MCQ 532: During gastrulation, the blastoderm splits into

        A. two layers
        B. one layer
        C. three layers
        D. four layers


MCQ 533: In Osteoporosis, the mass of bone is reduced and is caused by low levels of

        A. estrogen
        B. calcium
        C. vitamin-D
        D. minerals


MCQ 534: The structural and functional unit of life is called

        A. cell
        B. tissues
        C. organelle
        D. DNA


MCQ 535: A synapse, the axon endings of one neuron are connected to the

        A. axon of next neuron
        B. cell body of next neuron
        C. dendrites of next neuron
        D. dendron of next neuron


MCQ 536: For which of the following IAA stands?

        A. Iodine acetic acid
        B. initiator acetic acid
        C. indole acetic acid
        D. iron acetic acid


MCQ 537: Gray equatorial cytoplasm produces

        A. notochord only
        B. neural tube only
        C. gut
        D. notochord and neural tube


MCQ 538: When digestion takes place inside cells its is termed as

        A. extracellular
        B. intracellular
        C. cellular
        D. unicellular


MCQ 539: Upon foreign invasion, the blood cells produce chemicals called

        A. pathogens
        B. pyrogens
        C. receptors
        D. effectors


MCQ 540: The exchange of materials takes place between nucleus and cytoplasm with the help of

        A. nuclear pores
        B. nuclear membrane
        C. nucleus
        D. chromatin network


MCQ 541: Sakcharon is a Greek word for saccharine, which means

        A. starch
        B. sugar
        C. protein
        D. salt


MCQ 542: Drinking water and eating, moist food can compensate for the loss of water in animals that are

        A. terrestrial
        B. fresh water
        C. marine
        D. all of above


MCQ 543: The cause of Graves' disease is the production of an abnormal

        A. body fats
        B. body lipids
        C. body protein
        D. body salts


MCQ 544: The hip joint is formed by hip bone by a proximal bone

        A. tibia
        B. fibula
        C. femur
        D. humerus


MCQ 545: During periods of rapid growth, sexual maturation and stress situations, high levels of which is produced?

        A. oxytocin
        B. thyroxine
        C. testosterone
        D. parathyroid


MCQ 546: An enzyme which is devoid of its either prosthetic group or coenzyme is designated as

        A. holoenzyme
        B. apoenzyme
        C. substrate
        D. coenzyme


MCQ 547: Endo-parasite which live in the bile duct of a human and sheep is

        A. tape worms
        B. liver worts
        C. Fasciola
        D. round worms


MCQ 548: The shield of macromolecules which provides greater pathogenicity to bacteria and protect them against phagocytosis is known as

        A. capsule
        B. slime
        C. cell wall
        D. pili


MCQ 549: Plants obtain nutrients from which?

        A. water
        B. air
        C. soil
        D. sand


MCQ 550: The regulation of solute and balance of water is done by

        A. homeostasis
        B. thermoregulation
        C. osmoregulation
        D. diffusoregulation


MCQ 551: For flowering of plants, the most critical factor is the length of

        A. dark period
        B. day
        C. exposure to light
        D. exposure to red light


MCQ 552: The inactive form of pepsin which has the power of destroying the cell's internal structure is known as

        A. pepsinogen
        B. pectin
        C. pancreatic
        D. amino pectin


MCQ 553: The coloration of water orange, red or brown are the red tides which are caused by

        A. blooms
        B. mud
        C. dead plants
        D. sea anemone


MCQ 554: Enzymes are quite sensitive to change in concentration, temperature and

        A. location
        B. climate
        C. pH
        D. pressure


MCQ 555: The walls of any kind of cells and tissues become pitted during

        A. differentiation
        B. elongation
        C. cell division
        D. maturation


MCQ 556: Class fillicineae, class Gymnospermae and class Angiospermae are the sub-division of group

        A. lycopsida
        B. pterosida
        C. sphenopsida
        D. bryopsida


MCQ 557: The regeneration characteristic of algae was showed by

        A. Hammerlings
        B. Spemann
        C. Hans Driesch
        D. Dalton


MCQ 558: In myelinated neurons, the impulse jumps from node to node. This is called

        A. synapse
        B. transmitter nodes
        C. nodes of Ranvier
        D. nodes of impulse transfer


MCQ 559: Integument indehiscent megasporangium is a/an

        A. sperm
        B. ova
        C. ovule
        D. spores


MCQ 560: Parasitic fungi which can only grow on their living host are called

        A. obligate
        B. autotrophic
        C. heterotrophic
        D. hypotrophic


MCQ 561: The morphogenetic determinants are present in

        A. gastrocoele
        B. blastocoele
        C. blastomeres
        D. mesoderm


MCQ 562: The hormone is a Greek word meaning

        A. release
        B. diminishing
        C. exciting
        D. eliminating


MCQ 563: The effect of photoperiodism was first studied in 1920 by

        A. Darwin
        B. Garner and Allard
        C. Chargaff
        D. Alois


MCQ 564: Removal of excess salts from the body is done by the help of

        A. sweat glands
        B. sebaceous glands
        C. mammary glands
        D. all of above


MCQ 565: The water blooms formation is done by many species of

        A. bacillus
        B. cyanobacteria
        C. streptolatoria
        D. tetrad


MCQ 566: The callus helps in repairing a wound and unites the branches during

        A. budding only
        B. grafting only
        C. layering
        D. budding and grafting


MCQ 567: The naked spores which help penicillium in asexual reproduction are called

        A. conidia
        B. cones
        C. spores
        D. mycelium


MCQ 568: The shedding of the exoskeleton to replace it due to growth in the body is termed as

        A. moulting only
        B. ecdysis only
        C. molding
        D. moulting and ecdysis


MCQ 569: The system in animals which possess glands that secrete hormones is known as

        A. exocrine system
        B. circulatory system
        C. digestive system
        D. endocrine system


MCQ 570: The type of bacteria which is spherical and possesses several distinct arrangements based on their planes of division is

        A. cocci
        B. bacilli
        C. Spirillum
        D. helical


MCQ 571: The imbalance of electrolytes may lead to

        A. cardiac arrest
        B. kidney failure
        C. coma
        D. all of above


MCQ 572: The scapula is connected to the sternum via

        A. clavicle
        B. fore limb
        C. appendages
        D. pectoral girdle


MCQ 573: In bird's egg, the process of cell division is confined to the small disc of protoplasm lying on the surface of

        A. yolk at animal pole
        B. yolk at vegetative pole
        C. egg white at animal pole
        D. none of others


MCQ 574: An appropriate stimulus which can initiate a nerve impulse is known as

        A. powerful stimulus
        B. strong stimulus
        C. threshold stimulus
        D. high-voltage stimulus


MCQ 575: In juxtamedullary nephrons, additional capillaries extend down from loop of henel and termed as

        A. vasa recta
        B. renal hilus
        C. loop of henel
        D. distal part


MCQ 576: Mollusks contain a blue pigment which helps in

        A. digestion
        B. respiration
        C. circulation
        D. translocation


MCQ 577: There are 48 chromosomes in a cell of a

        A. chimpanzee
        B. human being
        C. drosophila
        D. monkey


MCQ 578: The tubular epithelium releases substances into the lumen, which balances pH is

        A. carbohydrates
        B. calcium ions
        C. hydrogen ions
        D. nitrogen ions


MCQ 579: When there is low tension of oxygen, oxyhemoglobin rapidly

        A. fade
        B. dissociate
        C. multiply
        D. balance


MCQ 580: Yeast which had been used for genetic research is

        A. neurospore
        B. spore
        C. paraspore
        D. regrow


MCQ 581: Excess thyroxine produces a condition called

        A. cretinism
        B. graves' disease
        C. gigantism
        D. progesterone


MCQ 582: A body which not have differentiated roots, stems, leaves and have no xylem or phloem at all is called a

        A. core
        B. vascular
        C. thallus
        D. pith


MCQ 583: Placental mammals whose hairs developed into spines are called as

        A. pangoline
        B. porcupine
        C. mole
        D. none of others


MCQ 584: Nervous design in any animal is highly co-related with its

        A. behavior pattern
        B. sleep cycle
        C. life style
        D. reproductive modes


MCQ 585: p730 to p660 conversion occurs in/at

        A. dark
        B. night
        C. evening
        D. dawn


MCQ 586: The unpaired facial bones are

        A. mandible only
        B. vomer only
        C. radius
        D. mandible and vomer


MCQ 587: The distal end of megasporangium become specialized for capturing

        A. pollen
        B. food
        C. water
        D. oxygen


MCQ 588: The quality of storing food using simple inorganic material belongs to plants which are

        A. heterotrophs
        B. autotrophs
        C. hypotrophs
        D. none of others


MCQ 589: Gram-positive bacteria Neisseria gonorrhoeae causes

        A. gonorrhea
        B. syphilis
        C. genital herpes
        D. acquired immune deficiency syndrome (AIDS)


MCQ 590: In raising blood pressure, the two hormones whose effect is synergistic are

        A. cortisol and corticosterone
        B. cortico-steroids and corticosterone
        C. aldosterone and androgenic hormones
        D. adrenaline and non-adrenaline


MCQ 591: The unit of classification is a

        A. genre
        B. specie
        C. cell
        D. kingdom


MCQ 592: The great power of regeneration is present in

        A. earthworm
        B. amphibians
        C. sponges
        D. sea urchin


MCQ 593: Water potential is maximum achieved when the cell is placed in

        A. soil
        B. oxygen
        C. pure water
        D. alcohol


MCQ 594: The appendages of bacteria which are hollow, non-helical and filamentous are called

        A. villi
        B. pili
        C. vibrio
        D. spirochete


MCQ 595: The absence of enzyme which helps in the catabolism of lipids, lead towards the disease called

        A. Glycogenesis
        B. Hay fever
        C. Tay sach's
        D. Anemia


MCQ 596: Between the uterine and fetal tissue, a circular organ is established called

        A. pericardium
        B. scrotum
        C. peritoneum
        D. placenta


MCQ 597: The substance which inhibits blood clotting is

        A. histamine
        B. microbes
        C. heparin
        D. pancrealin


MCQ 598: All veins in the body carry deoxygenated blood except

        A. aorta
        B. inferior venacava
        C. superior venacava
        D. pulmonary vein


MCQ 599: Hinge joint and ball and socket joint are examples of

        A. immovable joints
        B. movable joints
        C. freely movable joints
        D. fix joints


MCQ 600: Decrease of Follicle Stimulating Hormone (FSH) and the increase of estrogen causes the pituitary gland to secrete

        A. testosterone
        B. androgen
        C. luteinizing hormone
        D. thyroxine


MCQ 601: Neuroglia make up half of the nervous system in

        A. higher animals
        B. bacteria
        C. plants
        D. bryophytes


MCQ 602: The peripheral part of the blastoderm where the cells lie unseparated from the yolk is termed as

        A. area opaca
        B. area pellucida
        C. area translucent
        D. zone of junction


MCQ 603: If cofactor is loosely attached to the protein part, it is termed as

        A. substrate
        B. prosthetic group
        C. catalyst
        D. coenzyme


MCQ 604: The cylindrical body of a Sea Anemone can be cut into two halves vertically in any plane, there it belongs to Grade

        A. Radiata
        B. Bilateria
        C. Cordata
        D. none of others


MCQ 605: Which is right about water?

        A. universal solvent
        B. base
        C. acid
        D. universal solute


MCQ 606: A single cubic centimeter of the human brain may contain several

        A. hundred nerve cells
        B. thousand nerve cells
        C. billion nerve cells
        D. million nerve cells


MCQ 607: Any theory is considered a good theory if it leads to further hypothesis and is known as

        A. productive hypothesis
        B. generative hypothesis
        C. nil hypothesis
        D. multiple hypothesis


MCQ 608: Animalia is the Latin word which means

        A. cells
        B. Breath or soul
        C. body
        D. life


MCQ 609: The modification of behavior through a diminution of response to repeated stimuli is

        A. habituation
        B. conditioning
        C. imprinting
        D. taxes


MCQ 610: Abnormal development of hands, feet, and jaws is known as

        A. microcephaly
        B. gigantism
        C. acromegaly
        D. epilepsy


MCQ 611: Sharks and rays are present in the group of class

        A. Chondrichthyes
        B. Osteichthyes
        C. Plasteichtyes
        D. Malacostraca


MCQ 612: Sugars which are less sweet and less soluble in water are called

        A. monosaccharides
        B. polysaccharide
        C. oligosaccharides
        D. disaccharides


MCQ 613: The rib cage is composed of how many pairs of ribs?

        A. 12
        B. 14
        C. 10
        D. 8


MCQ 614: The rate of transpiration is increased with the increase in

        A. light
        B. temperature
        C. wind
        D. all of above


MCQ 615: Umbrella like form which is free-swimming and possesses sexual reproduction are

        A. medusae
        B. tentacles
        C. rhizoids
        D. gastrozoids


MCQ 616: The branches of lymph capillaries inside the villi of the intestine are termed as

        A. lymph nodes
        B. thoracic duct
        C. thoracic lymph duct
        D. lacteals


MCQ 617: HIV multiplies but doesn't cause disease in every individual because it is

        A. weak
        B. small
        C. host specific
        D. target humans


MCQ 618: In insects, there is no structural or functional relationship between excretory or digestive system except in

        A. earthworm
        B. cockroach
        C. lizards
        D. ants


MCQ 619: The least temperature at which growth can continue is

        A. 10-30 °C
        B. 5-10 °C
        C. 10-20 °C
        D. 10-40 °C


MCQ 620: Sprouting of potatoes is inhibited by

        A. ethane
        B. 2,4-Dichlorophenoxyacetic acid
        C. cytokinins
        D. ethene


MCQ 621: In the case of tissue transplant, the effect by which antigens reject foreign tissues is called

        A. auto-response
        B. cell-mediated response
        C. tissue-oriented response
        D. manual response


MCQ 622: The ability to form wing muscles and wings for flight in honey bees is

        A. learning behavior
        B. instinctive behavior
        C. habituation
        D. imprinting


MCQ 623: When carbohydrates combine with proteins, the outcome product is called

        A. glycoside
        B. glucosteroid
        C. glycoprotein
        D. glycolipid


MCQ 624: The common name for Enterobius vermiculations is

        A. tape worms
        B. pinworm
        C. liver fluke
        D. ring worm


MCQ 625: Changes in intracellular substances during aging include

        A. increased cross linkages of collagen
        B. loss of elasticity in elastic tissues
        C. loss of resilience in connective tissue
        D. all of above


MCQ 626: Wounded plants develop masses of amorphous material with very poor differentiation known as

        A. calluses
        B. galls
        C. nodes
        D. infection


MCQ 627: Cohesion tension theory was given by

        A. Charles
        B. Darwin
        C. Kreb
        D. Dixon


MCQ 628: The technique which involves the exposure of cancerous part of the body towards short wave radiations is

        A. chemotherapy
        B. radiotherapy
        C. gene therapy
        D. placebo therapy


MCQ 629: Transport of organic solutes is attained by the help of

        A. xylem
        B. phloem
        C. stem
        D. roots


MCQ 630: The structure of carbon is a

        A. monovalent
        B. bivalent
        C. tetravalent
        D. trivalent


MCQ 631: If euglenoids grow in dark due to lack of chlorophyll, they get the nutrients

        A. autotrophically
        B. herterotrophically
        C. parasitically
        D. hypotrophically


MCQ 632: The subdivision of bronchus is called

        A. bronchioles
        B. bronchi
        C. alveoli
        D. trachea


MCQ 633: The unlimited growth which expands by invasion and metastasis is

        A. carcinoma
        B. tuberculosis
        C. polio
        D. Human Immunodeficiency Virus (HIV)


MCQ 634: The parasite which lives inside the body of its host is called

        A. endoparasite
        B. exoparasite
        C. ectoparasite
        D. all of above


MCQ 635: The function of nephridiostome is to collect

        A. coelomic fluid
        B. collect waste material
        C. surround nephridia
        D. collect useful material


MCQ 636: Necrosis due to blockage by embolus leads to

        A. hypertension
        B. cerebral infarction
        C. myocardial infarction
        D. stroke


MCQ 637: Heat shock proteins encircle enzymes as self-defense and protect the plant against temperature above

        A. 10 °C
        B. 20 °C
        C. 30 °C
        D. 40 °C


MCQ 638: Vitamins are synthesized within the plant body in the presence of

        A. light
        B. heat
        C. cold
        D. fog


MCQ 639: The plants which produce flowers, fruits and seeds are from class

        A. angiospermae
        B. gymnospermae
        C. schlerenchyma
        D. none of others


MCQ 640: The pathway of the passage of impulse during a reflex action is called

        A. reflex path
        B. reflex way
        C. reflex arc
        D. reflex passage


MCQ 641: The inactive form of trypsin is called

        A. pepsinogen
        B. enterokinase
        C. trypsinogen
        D. none of others


MCQ 642: From Platyhelminthes to chordates including humans, the nervous system present is

        A. diffused type
        B. centralized type
        C. primary type
        D. reflex type


MCQ 643: The central metabolic cleaning house which is the central station of metabolism as well is

        A. kidney
        B. lungs
        C. heart
        D. liver


MCQ 644: Cellulose, pectin, and hemicelluloses together make up to form a

        A. primary wall
        B. secondary wall
        C. middle wall
        D. tertiary wall


MCQ 645: In vascular plants, growth occurs through the activity of

        A. meristems
        B. schlerenchyma
        C. collenchyma
        D. pith


MCQ 646: If a person receives polio vaccination he would become immune against

        A. small pox
        B. polio
        C. mumps
        D. measles


MCQ 647: Xylem, phloem, leaves, shoots, and roots are completely formed in stage

        A. 1 of differentiation
        B. 2 of differentiation
        C. 3 of differentiation
        D. 5 of differentiation


MCQ 648: Sleeping sickness and skin diseases are caused by Tsetse fly which transmits chemical called

        A. plasmodium
        B. trypanosome
        C. poison
        D. wax


MCQ 649: The left and right systemic arches in reptiles, deoxygenated blood is carried from

        A. inferior venacava
        B. superior venacava
        C. cavum venosum
        D. conus arteriosus


MCQ 650: The most important components of triglycerides are

        A. fatty acids
        B. C-H bonds
        C. steroids
        D. carotenoids


MCQ 651: The C-N link in an amino acid is called a

        A. polar bond
        B. covalent bond
        C. ionic bond
        D. peptide bond


MCQ 652: The enclosed seeded plants are another name for

        A. Angiospermae
        B. Gymnosperms
        C. gametophyte
        D. sporophyte


MCQ 653: Capsicum Annum and Capsicum Frutespens are rich in vitamin A and

        A. E
        B. D
        C. C
        D. K


MCQ 654: A reproductive cycle found in all the female mammals except a human is called

        A. oestrous cycle
        B. menstrual cycle
        C. menopause
        D. ovulatory cycle


MCQ 655: In kingdom Animalia a typical marine sponge is

        A. sycon
        B. spogilla
        C. euplectella
        D. leucoselenia


MCQ 656: The special pores help in gaseous exchange in cork tissue are

        A. stomata
        B. pores
        C. lenticels
        D. none of others


MCQ 657: The process of breakdown of mycelium, in which each broken fragment give rise to a new mycelium is

        A. fragmentation
        B. budding
        C. conjugation
        D. binary fission


MCQ 658: The elements which are transported throughout plants are called

        A. inorganic
        B. sieve elements
        C. key elements
        D. phloem elements


MCQ 659: The inner layer of the stomach wall is called

        A. ectoderm
        B. mucosa
        C. epithelium
        D. duodenum


MCQ 660: Late blight of potatoes is caused by a pathogen named as

        A. phytophthora infestans
        B. phytophthora
        C. infestants
        D. cortex


MCQ 661: Ciliates can reproduce sexually by the process of

        A. fertilization
        B. binary fission
        C. conjugation
        D. budding


MCQ 662: Plants which belong to group sphenopsida are also called

        A. arthrophytes
        B. bryophytes
        C. prokaryotes
        D. eukaryotes


MCQ 663: The human embryo is referred to as 'the fetus' from the beginning of which month of pregnancy?

        A. 1st
        B. 2nd
        C. 3rd
        D. 4th


MCQ 664: Young tissues or group of cells in plants that retain the potential to divide are called

        A. pith
        B. meristems
        C. cortex
        D. intercalary tissue


MCQ 665: The possible sign stimulus for digger wasp for which it responds is

        A. insect
        B. larva
        C. caterpillar
        D. nest


MCQ 666: When two bones meet, there occurs a

        A. appendages
        B. joint
        C. space
        D. multistage


MCQ 667: Seeds are capable of enduring unfavorable conditions when they are

        A. germinating
        B. dormant
        C. stored
        D. stowed


MCQ 668: Eyes and chemoreceptors are present in

        A. Planaria
        B. hydra
        C. plasmodium
        D. cortex


MCQ 669: The lungs of the frog are fully expanded like

        A. gases
        B. balloon
        C. ball
        D. none of others


MCQ 670: An estimate measurement of a chromosome in a close circle of Escherichia Coli is

        A. 1400 µm
        B. 1200 µm
        C. 1100 µm
        D. 1000 µm


MCQ 671: The arrangement of molecules of a primary wall is in a sequence of

        A. zigzag
        B. crisscross
        C. spiral
        D. conjugated


MCQ 672: Which one of the following is the role of the queen bee in bees?

        A. carries male gametes from male
        B. lay unfertilized egg
        C. keeps the sperms stored
        D. all of above


MCQ 673: Poliovirus is found all over the world causing serious disease

        A. paralysis
        B. brain hemorrhage
        C. mental retarded
        D. poliomyelitis


MCQ 674: Sponges are used in the surgical operations for the absorption of

        A. minerals
        B. blood and fluids
        C. nutritions
        D. carbohydrates


MCQ 675: If fertilized eggs are laid outside the female's body and develop there, this phenomenon is called

        A. oviparity
        B. ovoviparity
        C. viviparity
        D. viparity


MCQ 676: Waxes are also secreted by some

        A. animals
        B. plants
        C. bacteria
        D. insects


MCQ 677: The fertilization of the ovum takes place in the proximal part of the

        A. uterus
        B. oviduct
        C. vagina
        D. cervix


MCQ 678: The heads join thick and thin myofilament hence sometimes regarded as

        A. cross bridges
        B. bridges
        C. polypeptide complex
        D. A-band


MCQ 679: In plants duration of light effects, the

        A. vegetative growth
        B. reproductive growth
        C. flowering
        D. all of above


MCQ 680: The disease in which there is uncontrolled production of white blood cells is

        A. Leucaemia
        B. Thalassemia
        C. Oedema
        D. Anemia


MCQ 681: The nucleus taken from a somatic cell during cloning is introduced into an

        A. sperm cell
        B. egg cell
        C. zygote
        D. gamete


MCQ 682: A conjugated molecule of glycolipids is made when carbohydrates in cell combine with

        A. proteins
        B. ions
        C. carbohydrates
        D. lipids


MCQ 683: Liver functions are pivotal to

        A. homeostasis
        B. thermoregulation
        C. osmoregulation
        D. thalassemia


MCQ 684: Cell death in a brain area that produces dopamine causes

        A. epilepsy
        B. Alzheimer's disease
        C. parkinson's disease
        D. microcephaly


MCQ 685: A family of plant mostly found in warm temperate regions is

        A. Fabaceae
        B. Rosaceae
        C. Cassia
        D. Papilionaceae


MCQ 686: Phytochrome p660 absorbs red light at a wavelength of

        A. 330nm
        B. 440nm
        C. 660nm
        D. 550nm


MCQ 687: The rupture of seed coat and germination of seed coat effectively is facilitated by force

        A. bleeding
        B. grafting
        C. water pressure
        D. imbition


MCQ 688: The phenomenon in which light duration induce or suppress flowering is called

        A. photoperiodism
        B. phototactism
        C. photo flowering
        D. biorhythm


MCQ 689: Prolonged excessive secretion of thyroxine can lead to

        A. kidney failure
        B. cardiac failure
        C. lung failure
        D. ulcer


MCQ 690: Mature sperms are formed by differentiation in

        A. spermatogonia
        B. spermatids
        C. primary spermatocytes
        D. secondary spermatocytes


MCQ 691: Abstinence from smoking and maintaining an ideal weight can prolong life by an average of

        A. 5 years
        B. 7 years
        C. 11 years
        D. 20 years


MCQ 692: The reasoning which involves specific examples of observations and leads to a general principle is

        A. inductive reasoning
        B. deductive reasoning
        C. formal reasoning
        D. mature reasoning


MCQ 693: The fungi which help to improve the growth of a plant are

        A. mychorrhizal fungi
        B. parasitic fungi
        C. smut fungi
        D. rust fungi


MCQ 694: The protein structures which are long, unbranched and slender tubules are called

        A. microfilaments
        B. microtubules
        C. intermediate tubules
        D. chromatin fibers


MCQ 695: The enzyme which catalyzes the reaction of the Calvin cycle is known as

        A. phosphatase
        B. catalase
        C. rubisco
        D. amylase


MCQ 696: For egestion of waste materials, the cockroach has

        A. anus
        B. gizzard
        C. colon
        D. crop


MCQ 697: A group of the ribosome which is attached to mRNA by small ribosome unit is known as

        A. polyribosome
        B. polysome
        C. monosome
        D. oligosome


MCQ 698: The technique in which high concentration X-rays are directed towards stones from outside of the body is

        A. Eletracorporeal shock wave lithotripsy
        B. lithotripsy
        C. Dialysis
        D. Photolysis


MCQ 699: A continuous series of species which are arranged in ancestors to descendant sequence and each descendant has been evolved from an ancestor is known as

        A. serial linkages
        B. phyletic linkages
        C. continuous linkages
        D. evolutionary linkages


MCQ 700: Phytochrome p730 absorbs far-red light at

        A. 730nm
        B. 720nm
        C. 700nm
        D. 660nm


MCQ 701: The flow of water is faster when there is a steeper

        A. potential gradient
        B. water potential
        C. kinetic energy
        D. chemical energy


MCQ 702: Trachoma splits near to the heterocyst and helps in fragmentation by the formation of

        A. trachoma division
        B. metagonia
        C. harmogonia
        D. archegonia


MCQ 703: Double layered thin membranous sacs which cover the lung are called

        A. bronchioles
        B. bronchi
        C. bronchus
        D. pleura


MCQ 704: The protein coat of the virus is called

        A. capsule
        B. cell coat
        C. capsid
        D. DNA


MCQ 705: The long term change controlled by hormones is

        A. rate of growth
        B. rate of metabolic activity
        C. sexual maturity
        D. all of above


MCQ 706: Group of animals which have bilateral symmetry are known as Grade

        A. Radiata
        B. Chordata
        C. Bilateria
        D. Vertebrae


MCQ 707: Leucocytes travel to the site of invasion and protect the body against

        A. foreign invaders
        B. invaders
        C. food particles
        D. antibodies


MCQ 708: Which one of these is a freshwater sponge?

        A. sycon
        B. spogilla
        C. euplectella
        D. leucoselenia


MCQ 709: The action potential is triggered in the post-synaptic neuron by causing changes in its permeability to

        A. lipids
        B. certain ions
        C. proteins
        D. free radicals


MCQ 710: A sheet of skeletal muscles which are present in the chest is

        A. lungs
        B. chest cavity
        C. diaphragm
        D. ribs


MCQ 711: The autonomic nervous system is further divided into

        A. three parts
        B. two parts
        C. four parts
        D. five parts


MCQ 712: Midbrain contains reticular formation which is a relay center for connecting

        A. mid brain and forebrain
        B. midbrain and hind brain
        C. hind brain and forebrain
        D. only mid brain


MCQ 713: The non-reproductive parts of a plant are

        A. sepal and petal
        B. stamen and carpel
        C. sepal and stamen
        D. petal and carpel


MCQ 714: The term carbohydrate means

        A. carbon and hydrogen
        B. carbonated water
        C. hydrated carbon
        D. carbon hydroxyl


MCQ 715: The storage of vital chemicals is

        A. cytoplasm
        B. mitochondria
        C. golgi complex
        D. ribosome


MCQ 716: Nematodes lack respiratory system and

        A. digestive system
        B. nervous system
        C. circulatory system
        D. excretory system


MCQ 717: The leaves of mimosa require a specific time to regain its turgidity i.e.

        A. 5 minutes
        B. 10 minutes
        C. 8 minutes
        D. 12 minutes


MCQ 718: Internal fertilization occurs most often in

        A. aquatic animals
        B. land-based animals
        C. microbes
        D. amphibians


MCQ 719: Insulin is a primary structure of an amino acid which has two chains containing

        A. 51 amino acids
        B. 40 amino acids
        C. 50 amino acids
        D. 30 amino acids


MCQ 720: Adult Urochordates are sessile and covered by a layer called

        A. tunic
        B. craniates
        C. spogilla
        D. piliates


MCQ 721: The filtration of blood takes place in

        A. Bowman's capsule
        B. renal hilus
        C. loop of henel
        D. distal part


MCQ 722: The follicle-stimulating hormone in females stimulates

        A. fat deposition
        B. secretion of oestrogen
        C. hair growth
        D. egg production


MCQ 723: Cloning has been used for desirable animals such as

        A. race horses only
        B. prize bulls only
        C. human
        D. race horses and prize bulls


MCQ 724: Differentiation in plants is considered to occur in plants in

        A. two stages
        B. three stages
        C. four stages
        D. five stages


MCQ 725: The mass of the clotted blood in a broken bone is called

        A. callus
        B. hematoma
        C. humus
        D. hemorrhage


MCQ 726: Limb regeneration is mostly studied in

        A. earthworm
        B. salamander
        C. starfish
        D. sponges


MCQ 727: The virus which spreads with intimate physical contact, contaminated syringes and breastfeeding is known as

        A. Human Immunodeficiency Virus (HIV)
        B. Hepatitis B Virus (HBV)
        C. Hepatitis A Virus (HAV)
        D. Hepatitis C Virus (HCV)


MCQ 728: The hormone belonging to the only mineralocorticoid is

        A. cortisol
        B. corticosterone
        C. aldosterone
        D. androgens


MCQ 729: The release of the amino group during catabolism of amino acids is called

        A. ammunition
        B. hydrolysis
        C. deamination
        D. hydration


MCQ 730: All Protist have no common ancestor, that's why biologists regard them as

        A. common protist
        B. polyphyletic group
        C. ancient protists
        D. latest protists


MCQ 731: The sperm is carried out of the testes and towards the prostate and urethra by

        A. epididymis
        B. seminal vesicle
        C. vas deferens
        D. glans penis


MCQ 732: Herbivores can easily digest cellulose in their digestive tract because of

        A. pancreatic juice
        B. bile
        C. microorganisms
        D. liver


MCQ 733: The stage of development in which body organs are formed, cells interact and differentiate, is called

        A. gastrulation
        B. fertilization
        C. organogenesis
        D. growth


MCQ 734: The leaves are the major sites for the presence of

        A. lamina
        B. branches
        C. chloroplast
        D. centriole


MCQ 735: The third cleavage in the bird's egg is

        A. vertical
        B. horizontally parallel to the surface
        C. horizontal and perpendicular to the surface
        D. side ways


MCQ 736: Genital herpes is caused by

        A. neisseria gonorrhoeae
        B. treponema pallidum
        C. herpes simplex type 2
        D. spirochaete


MCQ 737: In annually growing trees, the active portion of the older tree is called

        A. heart wood
        B. sap wood
        C. callus
        D. bark


MCQ 738: The color of Corpus luteum in appearance is?

        A. greenish
        B. brownish
        C. yellowish
        D. black


MCQ 739: Dogs have specialized evaporative cooling inside the respiratory tract by

        A. licking
        B. sleeping
        C. panting
        D. woofing


MCQ 740: The internal buds which develop into new sponges are called

        A. ostia
        B. gemmules
        C. osculum
        D. none of others


MCQ 741: The stage of development in which organs size increase and adult body is attained is known as

        A. gamete formation
        B. gastrulation
        C. fertilization
        D. growth


MCQ 742: Centipede and millipedes are examples of class

        A. Myriapodia
        B. Insecta
        C. Arachnida
        D. Crustacean


MCQ 743: After menopause, the female stops producing

        A. saliva
        B. polar body
        C. ova
        D. estrogen


MCQ 744: The formation do antibodies is stimulated by

        A. antigens
        B. antibodies
        C. phacytosis
        D. foreign invasion


MCQ 745: The two chains of amino acids in an insulin molecule are held together by

        A. sulphide bridges
        B. disulphide bridges
        C. peptide bond
        D. covalent linkage


MCQ 746: The impulses which trigger heartbeat are maintained by

        A. systole
        B. diastole
        C. pace maker
        D. stunts


MCQ 747: The vertebral column provides more strength due to 4

        A. curvatures
        B. frontals
        C. appendages
        D. burantals


MCQ 748: The disadvantage of cloning is

        A. rapid aging
        B. low resistance
        C. short life span of organism
        D. deaging


MCQ 749: Asexual reproduction commonly occurs in

        A. plants
        B. less differentiated animals
        C. micro organisms
        D. all of above


MCQ 750: Corticosteroids produced by the fetus enter the maternal blood circulation and cause

        A. decrease in progesterone production
        B. increase in progesterone production
        C. decrease in oxytocin production
        D. decrease in testosterone production


MCQ 751: Organs which detect any change and receive stimuli are

        A. effectors
        B. receptors
        C. nerve endings
        D. neurons


MCQ 752: The active uptake of sodium is promoted by the action of an enzyme called

        A. antidiuretic
        B. diuretic
        C. aldosterone
        D. adrenatrone


MCQ 753: Cellulose gives no color when it comes in contact with

        A. carbon dioxide
        B. water
        C. iodine
        D. chloroform


MCQ 754: A molecule made up of copper and protein is called

        A. plastoquinone
        B. cytochromes
        C. plastocyanin
        D. chromosomes


MCQ 755: Anthoceropsida possesses stomata and chloroplasts in the epidermis which helps it in preparing their own food by

        A. mitosis
        B. photosynthesis
        C. meiosis
        D. calvin cycle


MCQ 756: The smooth form of endoplasmic reticulum is without

        A. Golgi complex
        B. ribosome
        C. nucleus
        D. mitochondria


MCQ 757: The water has an excellent ability to absorb heat without changing its own

        A. polarity
        B. shape
        C. temperature
        D. mass


MCQ 758: Mitochondria extracts energy from food and convert it into energy in the form of

        A. Adenosine Diphosphate (ADP)
        B. Adenosine Triphosphate (ATP)
        C. Atrial natriuretic Peptide (ANP)
        D. none of others


MCQ 759: The major constituent of control birth pill is

        A. oestrogen
        B. progesterone
        C. androgen
        D. testosterone


MCQ 760: Ring-shaped structures are usually seen in glucose and

        A. trioses
        B. ribose
        C. tetroses
        D. fructose


MCQ 761: Axial skeleton and appendicular skeleton are parts of

        A. human skeleton
        B. molluscus
        C. annelids
        D. snail


MCQ 762: An example of reflexes and instinct is

        A. aggression
        B. courtship
        C. social organizations
        D. all of above


MCQ 763: The notochord is a rod-like semi-rigid body of

        A. canals
        B. tubules
        C. vacuolated cells
        D. vacuoles


MCQ 764: Agranulocytes are produced in which of the following?

        A. lymphoid tissue
        B. red bone marrow
        C. white bone marrow
        D. none of others


MCQ 765: The continuous channels that appear to lie between the plasma membrane and nuclear membrane are

        A. Endoplasmic reticulum
        B. Golgi complex
        C. mitochondria
        D. ribosome


MCQ 766: Testosterone is secreted by cells between the seminiferous tubules called

        A. interstitial cells
        B. spermatids
        C. polar cells
        D. epithelium cells


MCQ 767: Secretin affects the production of

        A. bile only
        B. pancreatic juice only
        C. gastric juice
        D. bile and pancreatic juice


MCQ 768: A group of living organisms which are of same species and are located in one place is collectively termed as

        A. community
        B. groups
        C. individuals
        D. population


MCQ 769: Spermatogonia increase in size and differentiate into

        A. secondary spermatocytes
        B. primary spermatocytes
        C. spermatids
        D. oocytes


MCQ 770: The onset of Parkinson's disease is usually in

        A. 20's and 30's
        B. 30's and 40's
        C. 40's and 50's
        D. 50's and 60's


MCQ 771: A stable ecosystem is maintained with the interaction of

        A. prey
        B. predator
        C. predator-prey
        D. animals-human


MCQ 772: The mutualistic association between certain fungi and roots of vascular plants are called

        A. mycelium
        B. mycorrhizae
        C. rhizoids
        D. haustoria


MCQ 773: The regulation of potassium is achieved in plants due to opening and closing of

        A. guard cells
        B. xylem
        C. phloem
        D. stomata


MCQ 774: Vascular and cork cambium are examples of

        A. lateral meristems
        B. apical meristems
        C. intercalary meristems
        D. collenchyma


MCQ 775: Cells containing a single nucleus are called as

        A. mononucleated
        B. dinucleated
        C. single nucleated
        D. multinucleated


MCQ 776: Leaves fall of helping in the plant to get rid of accumulated wastes hence called

        A. helper
        B. sacrifice
        C. excretophore
        D. ebony


MCQ 777: All birds in nature are

        A. viviparous
        B. oviparous
        C. ovoviviparous
        D. viparous


MCQ 778: The thick-walled, enlarged vegetative cells which accumulate food are called as

        A. cytokinesis
        B. Akinetes
        C. endokinetes
        D. exokinetes


MCQ 779: If one amino acid in each beta chain of hemoglobin, out of 574 amino acids do not occupy the normal place it can lead to

        A. paralysis
        B. death
        C. cramp
        D. fits


MCQ 780: Phytochromes exist in how many forms?

        A. one
        B. two
        C. three
        D. four


MCQ 781: During development the blastoderm shape changes from circular to

        A. apple shaped
        B. oval shaped
        C. pear shaped
        D. triangular shape


MCQ 782: The most abundant compound also known as the medium of life is

        A. air
        B. oxygen
        C. water
        D. food


MCQ 783: Ascospores, upon meiosis zygote, may produce fruiting bodies called

        A. basidiocarps
        B. basicarps
        C. ascocarps
        D. acicarps


MCQ 784: The chitinous cuticle is secreted by

        A. endodermis
        B. epidermis
        C. cell wall
        D. nuclear envelope


MCQ 785: Gibberellins are produced commercially from

        A. fungal culture
        B. bacterial culture
        C. plants
        D. viruses


MCQ 786: K+ ions during active potential causes repolarization by

        A. rushing inside
        B. diffusing outside
        C. not moving
        D. diffusing inside


MCQ 787: The animals which lack tissues organized into organs and are asymmetrical are from the subkingdom

        A. protozoa
        B. metazoa
        C. parazoa
        D. eumetazoa


MCQ 788: Microorganisms could cause disease, was proved by

        A. Robert Hook
        B. Herbert Copeland
        C. Louis Pasteur
        D. John hogg


MCQ 789: Naphthalene acetic acid (NAA) and 2,4 dichloro phenoxy acetic acid is

        A. natural auxins
        B. gibberellins
        C. cytokinins
        D. synthetic auxins


MCQ 790: The ovary under the stimulus of Follicle Stimulating Hormone (FSH) produces

        A. estrogen
        B. testosterone
        C. oxytocin
        D. thyroxine


MCQ 791: Kidneys receive 20% of blood with each

        A. urea cycle
        B. cardiac beat
        C. cardiac cycle
        D. ovulatory cycle


MCQ 792: The periodic reproductive cycle in females is commonly known as

        A. oestrous cycle
        B. menstrual cycle
        C. ovulatory cycle
        D. menopause


MCQ 793: The plant growth ceases in the absence of

        A. oxygen
        B. water
        C. vitamins
        D. all of above


MCQ 794: The female body is prepared for lactation by

        A. Luteotropic Hormone (LTH) only
        B. human placental lactogen only
        C. oxytocin
        D. Luteotropic Hormone (LTH) and human placental lactogen


MCQ 795: Fruit development without fertilization with no seed formation is called

        A. binary fission
        B. pathenocarpy
        C. budding
        D. grafting


MCQ 796: Henbane (hyoscyamus niger) is a

        A. short day plant
        B. long day plant
        C. neutral plant
        D. day neutral plant


MCQ 797: The most important components of phospholipids involve

        A. choline
        B. ethanolamine
        C. serine
        D. all of above


MCQ 798: The inactive form of the enzyme pepsin is called

        A. peptone
        B. lipase
        C. maltose
        D. Pepsinogen


MCQ 799: A valuable and most important quality of proteins is to prevent blood loss after an injury by the process of

        A. (coagulation)blood clotting
        B. cell division
        C. imputation
        D. glycolysis


MCQ 800: In the case of uremia, the only treatment left is

        A. kidney transplant
        B. lithotripsy
        C. dialysis
        D. lung transplant


MCQ 801: Genital soreness and ulcers are caused in the disease

        A. gonorrhea
        B. syphilis
        C. genital herpes
        D. acquired immune deficiency syndrome (AIDS)


MCQ 802: A chemical substance which can block an active site is called

        A. blocker
        B. deactivator
        C. inhibitor
        D. enzyme


MCQ 803: The special complex which is built in the thylakoid membrane which helps in moving downgradient is called

        A. Adenosine Triphosphate (ATP) complex
        B. Adenosine Diphosphate (ADP) synthase
        C. Adenosine Triphosphate (ATP) synthase
        D. Adenosine Diphosphate (ADP) complex


MCQ 804: The megaspores produced after evolutionary phase germinated to form

        A. mega gametophyte
        B. microgametophyte
        C. macrogametophyte
        D. none of others


MCQ 805: Many bacteria contain additional molecules which are very helpful in modern genetic engineering techniques, they are circular and self-replicating and called as

        A. ribosomes
        B. spores
        C. plasmids
        D. mesosome


MCQ 806: Due to its unique properties carbon can react with many known elements forming

        A. covalent bond
        B. ionic bond
        C. coordinate covalent bond
        D. hydrogen bond


MCQ 807: Gastric secretion may also be inhibited by

        A. lipase
        B. pepsin
        C. maltose
        D. secretin


MCQ 808: Ganglia are the structures formed by the cluster of

        A. cell bodies
        B. axons
        C. dendrites
        D. whole neurons


MCQ 809: Cellulose is highly insoluble in water and is not digested in the digestive tract of

        A. human
        B. birds
        C. protozoa's
        D. insects


MCQ 810: The place on a chromosome where spindle fibers are attached during cell division is called

        A. chromatids
        B. centromere
        C. centrioles
        D. mitochondria


MCQ 811: Balanoglossus and Saccoglossus belongs to the phylum

        A. radiata
        B. bilateria
        C. fungi
        D. hemichordate


MCQ 812: Which of the following is included in kingdom Animalia?

        A. unicellular organisms
        B. multicellular organisms
        C. micro-organisms
        D. invertebrates


MCQ 813: The digestion which is imperfect or incomplete is called

        A. botulism
        B. dyspepsia
        C. ulcer
        D. piles


MCQ 814: Class Arachnida has special appendages on their body called as

        A. pedipalps
        B. gills
        C. antennae
        D. chelicerae


MCQ 815: Glomerulus circulates the blood via

        A. afferent arterioles
        B. efferent arterioles
        C. afferent venule
        D. efferent venule


MCQ 816: The animals sometimes respond instinctively to specific and complex stimuli called

        A. special stimuli
        B. symbol stimuli
        C. sign stimuli
        D. free stimuli


MCQ 817: The support to the baby plants is availed by cells

        A. collenchymatous
        B. sclerenchymatous
        C. conjectimatous
        D. none of others


MCQ 818: Lymph capillaries join together forming larger lymph vessels, which give rise to

        A. lymph duct
        B. thoracic duct
        C. thoracic lymph duct
        D. sperm duct


MCQ 819: If vibration becomes too violent on increasing heat above the limit, the enzyme activity will be lost and the enzyme is said to be

        A. catalyzed
        B. broken
        C. denatured
        D. failed


MCQ 820: The electrical potential that exists across a cell membrane is called

        A. plasma potential
        B. membrane potential
        C. resting-membrane potential
        D. active potential


MCQ 821: Organisms having both the sexes are known as

        A. bisexual organisms only
        B. hermaphrodites only
        C. unisexual organisms
        D. bisexual organisms and hermaphrodites


MCQ 822: Different organs system assembled in animals and human beings to form a/an

        A. individual
        B. system
        C. organelle
        D. organelles


MCQ 823: The part of hydra's body that is most responsive to a stimulus is

        A. body wall
        B. bud
        C. tentacles
        D. mouth


MCQ 824: When the cell enlargement ceases, the process that starts is

        A. elongation
        B. differentiation
        C. cell division
        D. maturation


MCQ 825: The secretions hardened in polyps and covered by stony cup in

        A. coral reefs
        B. shells
        C. sponges
        D. sea anemone


MCQ 826: The seed is composed of an embryo and

        A. food
        B. water
        C. chlorophyll
        D. sunlight


MCQ 827: The lateral plate mesoderm is split into

        A. somatic mesoderm only
        B. splanchnic mesoderm only
        C. epiblast
        D. somatic and splanchnic mesoderm


MCQ 828: During the process of exosmosis, the protoplast shrink which is termed as

        A. plasmodesmata
        B. plamolysis
        C. proteolysis
        D. lytic cycle


MCQ 829: Impulse carried by motor neurons is received by

        A. receptors
        B. central nervous system
        C. effectors
        D. brain only


MCQ 830: The ions in the apoplast pathway are further prevented for progress by

        A. endodermis
        B. ectodermis
        C. casparian strips
        D. xylem


MCQ 831: A thick rigid spiral is called

        A. Vibrio
        B. Spirrilum
        C. spirochete
        D. Baccili


MCQ 832: Proteins comprise off total dry weight in a cell which is over

        A. 0.6
        B. 0.5
        C. 0.7
        D. 0.4


MCQ 833: If a person frequently shrieks and cries and falls unconscious and rigid. This might be a sign of

        A. Alzheimer's disease
        B. parkinson's disease
        C. epilepsy
        D. arthritis


MCQ 834: The family of Octopus is called

        A. gastropoda
        B. pelecypoda
        C. cephalopoda
        D. liquipoda


MCQ 835: The oxidizing agent which removes hydrogen from fumarate is called

        A. Flavin Adenine Dinucleotide (FAD)
        B. Nicotinamide Adenine Dinucleotide (NAD)
        C. Nicotinamide Adenine Dinucleotide Phosphate (NADP)
        D. Nicotinamide Adenine Dinucleotide Phosphate Hydrogen (NADPH)


MCQ 836: A warm spell in winter for seed is

        A. permanent favorable
        B. temporary favorable
        C. apparently favorable
        D. not favorable


MCQ 837: In a coordination system, Nicotine mimics the action of

        A. oxytocin
        B. testosterone
        C. cortisone
        D. acetylcholine


MCQ 838: The maintenance of internal temperature within a tolerable range is called

        A. Osmoregulation
        B. thermoregulation
        C. homeostasis
        D. none of others


MCQ 839: A mammalian cell contains 18% of

        A. water
        B. proteins
        C. ions
        D. fats


MCQ 840: Hypotonic environment leads to cell towards

        A. concentration
        B. turgidity
        C. wilting
        D. shrinking


MCQ 841: The pituitary gland on the onset of puberty releases

        A. Somatotrophin Hormone (STH)
        B. Thyroid Stimulating Hormone (TSH)
        C. Follicle Stimulating Hormone (FSH)
        D. oxytocin


MCQ 842: Primary oocytes divide meiotically into

        A. haploid secondary oocyte
        B. polar body
        C. haploid secondary oocyte and polar body
        D. diploid secondary oocyte


MCQ 843: The folds or convolutions in the cerebrum are related to

        A. memory formation
        B. aggression
        C. intelligence
        D. pleasure


MCQ 844: Lock and Key model was developed for the visualization of substrate and enzyme concentration was proposed by

        A. Emil Fischer
        B. F. Sanger
        C. Erwin Chargaff
        D. Edward


MCQ 845: The two most important ions in a nerve cell are

        A. Cl- and K+
        B. Na+ and K+
        C. Na+ and Fe?
        D. Mg+ and H+


MCQ 846: The clot facilitate an injury by covering it to prevent further bleeding until damaged tissue can be

        A. produce
        B. repair
        C. destroyed
        D. phagocytosed


MCQ 847: When the internal environment is concentrated due to external change this is

        A. hypertonic environment
        B. hypotonic environment
        C. isotonic environment
        D. hyperactive environment


MCQ 848: Muscles are composed of which?

        A. actin only
        B. myosin only
        C. insulin
        D. actin and myosin


MCQ 849: The earliest known bird is

        A. archaceoptephyx
        B. crow
        C. eagle
        D. dote


MCQ 850: Preventing the loss of sodium ions from the kidney tubes is a function of

        A. cortisol
        B. aldosterone
        C. corticosterone
        D. gastrin


MCQ 851: The first two cleavage planes are

        A. horizontal
        B. one horizontal and one vertical
        C. vertical
        D. diagonal


MCQ 852: Nephrons have extensive blood supply by

        A. renal veins
        B. renal arteries
        C. hepatic arteries
        D. peritoneal veins


MCQ 853: Auxin inhibits the growth of

        A. stem cells
        B. leaves cells
        C. shoots
        D. roots cell


MCQ 854: Myelin sheath around a neuron is for

        A. elasticity
        B. protection
        C. nutrition
        D. detecting stimuli


MCQ 855: The definite but changeable shape is given to ciliates by its outer covering called a

        A. cell wall
        B. pedicle
        C. pellicle
        D. cell membrane


MCQ 856: The lowering of leaves in the evening and raising them in the morning are regarded as

        A. chemo tactic movement
        B. photo tactic movement
        C. sleep movements
        D. rapid movements


MCQ 857: The gases which swim bladders can fill in their Pharynx are Oxygen, CO2 and

        A. nitrogen
        B. hydrogen
        C. CO
        D. helium


MCQ 858: The fungi which are very sensitive to pollution are called

        A. smut fungi
        B. lichens
        C. hyphal fungi
        D. bacterium


MCQ 859: Bacteria reproduce asexually by the process of

        A. multiple fission
        B. budding
        C. binary fission
        D. trinary fusion


MCQ 860: The muscles which are called striped, striated and voluntary are

        A. smooth muscles
        B. cardiac muscles
        C. skeletal muscles
        D. rough muscles


MCQ 861: The phenomenon of releasing ovum from the ovary is called

        A. ejaculation
        B. ejection
        C. oocytation
        D. ovulation


MCQ 862: The twins which are produced sexually are

        A. identical twins
        B. true twins
        C. monozygotic twins
        D. fraternal twins


MCQ 863: The central nervous system, heart, skin and eye bones joints are damaged in

        A. gonorrhea
        B. syphilis
        C. genital herpes
        D. acquired immune deficiency syndrome (AIDS)


MCQ 864: The gastrovascular cavity for entry of food as well as the removal of waste constitutes sac like

        A. digestive system
        B. excretory system
        C. nervous system
        D. circulatory system


MCQ 865: The tertiary conformation of proteins is maintained by 3 types of bonds namely ionic, hydrogen and

        A. sulphide
        B. disulphide
        C. covalent
        D. peptide


MCQ 866: The cell body of a neuron is also known as

        A. main body
        B. soma
        C. soma body
        D. stoma


MCQ 867: The mode of transport in diploblastic animals is

        A. diffusion
        B. osmosis
        C. pores
        D. gills


MCQ 868: The exoskeleton appears on the dorsal side of the Arthropods in the form of

        A. cephalothorax
        B. carapace
        C. gills
        D. scales


MCQ 869: A layer made of polysaccharide which is non-living, vascular and secreted by epidermis is called

        A. epidermis
        B. chitin
        C. exoskeleton
        D. endodermis


MCQ 870: The tissues which are specialized for conducting water are termed as

        A. Phloem Tissue
        B. Muscle Tissue
        C. Glandular Tissue
        D. Xylem tissue


MCQ 871: The control center of sensory areas like sight, speech, taste, smell, and hearing is

        A. hypothalamus
        B. cerebellum
        C. cerebrum
        D. thalamus


MCQ 872: A cellular which capped the body throughout have specialized cells called as

        A. nephridiophore
        B. nephrostome
        C. cnidarians
        D. flame cells


MCQ 873: The part of the brain which serves as a relay station between the body and the cerebrum

        A. hypothalamus
        B. amygdala
        C. thalamus
        D. cerebellum


MCQ 874: Inferior vena cava and superior vena cava collect blood from the body and pour in heart's

        A. right atrium
        B. left atrium
        C. right ventricle
        D. left ventricle


MCQ 875: Hyphae which lack septa and contain long multinucleated large cell are called

        A. mycelium
        B. coenocytic hyphae
        C. enocytic hyphae
        D. hyphae


MCQ 876: Sepals and petals also help in pollination, so after pollination they usually

        A. developed
        B. fall off
        C. regrow
        D. remain same


MCQ 877: A compound which is responsible for the structure of membranes of cell and its organelles is a

        A. lipid
        B. proteins
        C. fats, glucose, starch
        D. waxes


MCQ 878: In mammals, the main key role for thermoregulation has been adapted by

        A. nails
        B. skin
        C. hairs
        D. all of above


MCQ 879: The corpuscles which are combined with potassium are the carriers of

        A. carbon dioxide
        B. oxygen
        C. hydrogen
        D. nitrogen


MCQ 880: Spemann divided the zygote of salamander into how many parts?

        A. three
        B. two
        C. four
        D. five


MCQ 881: In amphibians, thyroxine bring about the process of

        A. ecdysis
        B. metamorphosis
        C. egg laying
        D. growth


MCQ 882: The plant body is attached to the soil by the help of rhizoids in species of Bryophytes known as

        A. protonema
        B. psilopsida
        C. gametophyte
        D. marchantia


MCQ 883: In reproduction, sperm fertilizes the

        A. primary oocyte
        B. oogonia
        C. secondary oocyte
        D. polar body


MCQ 884: In kingdom Animalia, Hydra and obelia are

        A. parasites
        B. sessile
        C. protists
        D. cones


MCQ 885: Along with auxins, the hormone that causes apical dominance is

        A. ethene
        B. cytokinin
        C. gibberellin
        D. thyroxine


MCQ 886: In the condition of low oxygen concentration, oxyhemoglobin is

        A. stable
        B. unstable
        C. transitional
        D. none of others


MCQ 887: Maintaining body position is the function of

        A. cerebrum
        B. pons
        C. cerebellum
        D. medulla


MCQ 888: Sensilla are a specialized modification of exoskeleton for exchange of

        A. body fluid
        B. gases
        C. nitrogenous waste
        D. oxygen


MCQ 889: Behavioral modification involving the application of insight or reasoning to a novel situation is

        A. latent learning
        B. imprinting
        C. insight learning
        D. conditioning


MCQ 890: The transport of deoxygenated blood from the right ventricle to the lungs is done by

        A. arterial circulation
        B. venous circulation
        C. pulmonary circulation
        D. systemic circulation


MCQ 891: The 'little ring' is a common name for the organism of Phylum

        A. Protozoa
        B. Aneelida
        C. platyhelminthes
        D. Nematoda


MCQ 892: The mode of fertilization in class Pisces is

        A. internal
        B. external
        C. vertical
        D. none of others


MCQ 893: Tobacco plant flowers only after exposure to a series of

        A. long days
        B. dark days
        C. light days
        D. short days


MCQ 894: The average age of menopause for females is

        A. 30 years
        B. 41 years
        C. 51 years
        D. 60 years


MCQ 895: The leaves of mimosa results form a rapid loss of its turgor in the period of

        A. 1-2 seconds
        B. 2-3 seconds
        C. 3-4 seconds
        D. 4-5 seconds


MCQ 896: Bacteriophages are of two structural forms either cubical symmetry or

        A. spiral
        B. zigzag
        C. helical
        D. stranded


MCQ 897: High level of aluminum contributes to the onset of

        A. epilepsy
        B. dementia
        C. alzheimer's disease
        D. parkinson's disease


MCQ 898: If the two generations during alternation of generation in plants are vegetative similar it is referred to as

        A. heteromorphic
        B. isomorphic
        C. diplohaplontic
        D. none of others


MCQ 899: The dominant diploid sporophyte generation alternates with inconspicuous haploid gametophyte generation, it is the pattern of the cycle of

        A. pinus
        B. cones
        C. pine
        D. none of others


MCQ 900: Throughout the axoplasm, there are present

        A. microtubules
        B. neurofibrils
        C. rough endoplasmic reticulum and mitochondria
        D. all of above


MCQ 901: All the insectivorous plants are true

        A. heterotrophs
        B. autotrophs
        C. hypotrophs
        D. none of others


MCQ 902: A special condition of rest which enables an embryo to survive the long periods of unfavorable conditions is called

        A. seed sleep
        B. seed inactivity
        C. seed dormancy
        D. seed rest


MCQ 903: Once the placenta is established, it starts secreting the hormone

        A. estrogen
        B. oxytocin
        C. progesterone
        D. testosterone


MCQ 904: The capacity to tolerate dehydration in animals is termed as

        A. hydrobiosis
        B. anhydrobiosis
        C. hydrobiosis
        D. none of others


MCQ 905: The reproductive structures of spores are called

        A. buds
        B. fragments
        C. sporangia
        D. layers


MCQ 906: There are five kingdoms according to Lynn and Karoline which are Prokaryotes, Protoctista, Fungi, Animalia and

        A. eukaryotes
        B. plantae
        C. protista
        D. vertebrates


MCQ 907: The electric shock which can stun prey is the specialized feature of

        A. ray fish
        B. dolphin
        C. shark
        D. goldfish


MCQ 908: The presence of a nucleus in a cell was reported by

        A. Robert Hooke
        B. Robert Brown
        C. Lorenz Oaken
        D. Theodor Schwann


MCQ 909: Lymph nodes are found in which part?

        A. neck region
        B. axilla
        C. groin
        D. all of above


MCQ 910: Chemo active movements response towards the stimulus of

        A. light
        B. heat
        C. chemicals
        D. air


MCQ 911: Class amphibian, reptilian, aves and mammalian belong to sub-phylum called

        A. pices
        B. echinodermata
        C. chordate
        D. tetrapod


MCQ 912: The abdominal pouch of class Metatheria is called as

        A. pouch
        B. kangaroo pouch
        C. marsupium
        D. metatheria pouch


MCQ 913: The walls of the glomerulus are

        A. permeable
        B. porous
        C. semi permeable
        D. close


MCQ 914: The example of animals bearing special shell composed of calcium crystals

        A. marine bivalvia
        B. molluscus
        C. ant
        D. snails


MCQ 915: Vagus nerve is present in which nervous system?

        A. sympathetic
        B. para-sympathetic
        C. somatic
        D. none of others


MCQ 916: Food which supplies elements necessary for metabolism are called

        A. carbohydrates
        B. nutrient
        C. cell wall
        D. iron


MCQ 917: Active transport depends on

        A. photosynthesis
        B. respiration
        C. translocation
        D. transpiration


MCQ 918: B-lymphocytes is the name given due to the relationship with

        A. Thymus gland
        B. Busra of Fabricius
        C. Busra of Thymus
        D. Busra of glands


MCQ 919: The parasites which are not wholly dependent on their host and can survive without them, are called

        A. obligate parasites
        B. facultative parasite
        C. ectoparasite
        D. none of others


MCQ 920: In females, the production of the egg is a

        A. continuous process
        B. cyclic activity
        C. never ending process
        D. once in a life time event


MCQ 921: The flaps of the tricuspid valve are attached to fibrous cords called

        A. chordae tendineae
        B. venae cava
        C. semi lunar valves
        D. tricuspid valves


MCQ 922: The edge of the capsule of sporangium is made up of two parts, the annulus and the

        A. stomium
        B. sori
        C. sporophyll
        D. chlorophyll


MCQ 923: T.W.Engelmann, in 1833, obtained the first action spectrum while working on

        A. bacteria
        B. virus
        C. spirogyra
        D. fungi


MCQ 924: There is no involvement of blood in the transport of gases in

        A. fish
        B. human
        C. reptiles
        D. cockroach


MCQ 925: If the two gametes uniting are different in size and structure, they are called

        A. heterogametes only
        B. anisogamete only
        C. isogamete
        D. heterogametes and anisogamete


MCQ 926: GA3 is used in the brewing industry to stimulate the production of

        A. lipase
        B. trypsin
        C. maltase
        D. amylase


MCQ 927: Ervin Bunning proved the innate nature of 24 hr. rhythm in

        A. drosophila
        B. rats
        C. pisum sativum
        D. fungi


MCQ 928: Clycylalanine belongs to which class of peptides?

        A. dipeptide
        B. monopepttide
        C. polypeptide
        D. tertrapeptide


MCQ 929: Flagella respond to chemical signals by movement with the help of flagella, this behavior is called as

        A. chemotaxis
        B. phototaxis
        C. thermotaxis
        D. hypotaxis


MCQ 930: In Platyhelminthes, respiratory and circulatory system are

        A. present
        B. absent
        C. weak
        D. partially present


MCQ 931: The spontaneous movements which occur as a result of internal causes are called

        A. paratonic
        B. autonomic
        C. turgor
        D. growth


MCQ 932: When capillaries join together, they form

        A. veins
        B. venule
        C. arterioles
        D. arteries


MCQ 933: All vertebrates possess which circulatory system?

        A. open
        B. close
        C. partially
        D. partially


MCQ 934: Cnidarians are usually found in two basic forms the polyps and the

        A. colony
        B. flame cells
        C. cysts
        D. medusae


MCQ 935: Fumarate is converted to malate while adding a molecule of

        A. hydrogen
        B. sugar
        C. nitrogen
        D. water


MCQ 936: The conversion of stones into sand or minute pieces after shock wave treatment are passed out in

        A. sweat
        B. urine
        C. secretions
        D. lacerations


MCQ 937: Planaria has no body cavity, instead, it has mesenchyme layer of cells which are loosely packed between ectoderm and endoderm, hence called

        A. coelomates
        B. acoelomates
        C. partially coelomates
        D. partially acoelomates


MCQ 938: Rough endoplasmic reticulum assists in the synthesis of

        A. carbohydrates
        B. proteins
        C. fats, glucose, starch
        D. lipids


MCQ 939: The percentage of plasma in human blood is about

        A. 0.5
        B. 0.35
        C. 0.55
        D. 0.4


MCQ 940: The AIDS virus penetrates the host's

        A. red blood cells
        B. platelets
        C. brain cells
        D. leukocytes


MCQ 941: Despite the tapeworm being bisexual, cross-fertilization is ensured to maintain

        A. genetic recombination
        B. genetic variability
        C. new combinations of traits
        D. all of above


MCQ 942: The largest brown algae which are tough and leathery in its appearance is called the

        A. kelps
        B. elps
        C. brown algae
        D. green algae


MCQ 943: Tentacular feeding is adapted in

        A. sea anemone
        B. star fish
        C. hydra
        D. jelly fish


MCQ 944: A complete, mature and infectious particle of the virus is called as

        A. venom
        B. virion
        C. head
        D. tail


MCQ 945: The human central nervous system is made up of

        A. 10 to 100 billion neurons
        B. 100 to 1000 billion neurons
        C. 10 to 100 million neurons
        D. 100 to 1000 million neurons


MCQ 946: Autonomic nervous system controls

        A. voluntary movements
        B. reflex actions
        C. semi-voluntary movements
        D. involuntary movements


MCQ 947: Biorhythms showing periodicity of about 24 hrs. are called

        A. circadian rhythm
        B. circannual rhythm
        C. circbiannual rhythm
        D. regular rhythm


MCQ 948: The animals which feed on dead and decomposed debris are called

        A. herbivores
        B. carnivores
        C. detritivores
        D. omnivores


MCQ 949: Closely packed cylindrical structures present within epithelial cells is called

        A. epithelium
        B. phloem
        C. xylem
        D. epidermis


MCQ 950: The reasoning which moves from a general statement towards a particular conclusion is

        A. inductive reasoning
        B. deductive reasoning
        C. innovative reasoning
        D. detective reasoning


MCQ 951: The evolutionary adaptations of nitrogenous wastes are

        A. ammonotelic only
        B. ureotelic only
        C. hydrotelic
        D. ammonotelic and ureotelic


MCQ 952: Organisms which have a distinct nucleus with (chromatin material and a nucleolus) are called

        A. Prokaryotic
        B. eukaryotic
        C. protozoans
        D. protoctists


MCQ 953: A single mouthed sac-like digestive cavity in cnidarian is called

        A. osulum
        B. ostia
        C. enteron
        D. canal


MCQ 954: Meiosis is also known as

        A. binary fission
        B. parthenogenesis
        C. reduction division
        D. none of others


MCQ 955: The arrangement of unequal dichotomies in a single plane is called

        A. planation
        B. budding
        C. webbing
        D. overtopping


MCQ 956: The water potential of pure water is equal to

        A. one
        B. zero
        C. infinite
        D. alpha


MCQ 957: In the resting membrane, potential sodium ions are higher in an amount outside than inside the membrane surface is

        A. ten times
        B. twenty times
        C. fifteen times
        D. twenty two times


MCQ 958: The somatic nervous system is made up of

        A. motor neurons
        B. sensory neurons
        C. associative neurons
        D. relay neurons


MCQ 959: The small pores which help water to enter the body of sponges are called

        A. enteron
        B. otia
        C. osculum
        D. stomata


MCQ 960: Glycolysis means splitting of which molecule?

        A. nitrogen
        B. oxygen
        C. sugar
        D. protein


MCQ 961: Giant Squid is the largest invertebrate

        A. bird
        B. animal
        C. mammal
        D. reptile


MCQ 962: The lipids which are composed of glycerol and fatty acids are called

        A. acylglycerols
        B. waxes
        C. phospholipids
        D. glycolipids


MCQ 963: The movement by which food is passed into the stomach and mouth from the intestine is due to a movement known as

        A. peristalsis
        B. anti-peristalsis
        C. dynamic peristalsis
        D. reverse peristalsis


MCQ 964: Red light helps in the promotion of

        A. germination of fern spores
        B. leaf expansion in dicots
        C. leaf unrolling in grasses
        D. all of above


MCQ 965: A single rotting apple may contain an estimated number of worms i.e.,

        A. 90000
        B. 80000
        C. 70000
        D. 10000


MCQ 966: The gills of bony fishes are covered by

        A. operculum
        B. dermal
        C. scales
        D. cycloid scales


MCQ 967: The pore-bearing animals are commonly called

        A. sponges
        B. molasses
        C. coral reefs
        D. sea anemone


MCQ 968: The process of aging can be slowed by

        A. better nutrition
        B. improved living conditions
        C. adequate sleep
        D. all of above


MCQ 969: Breathing and swallowing are controlled by

        A. medulla
        B. pons
        C. cerebellum
        D. thalamus


MCQ 970: Peroxisomes are usually found in protozoa and

        A. protoctist
        B. monera
        C. yeast
        D. fungi


MCQ 971: Chlorophyll (b) facilitate chlorophyll bypassing absorbed

        A. heat energy
        B. light energy
        C. light
        D. heat


MCQ 972: The platelets are large cells which are in the form of fragments are called

        A. karyocytes
        B. megakaryocytes
        C. T-lymphocytes
        D. plasma


MCQ 973: A large regional community which is primarily determined by the climate is termed as a

        A. weather
        B. space
        C. biome
        D. ecosystem


MCQ 974: Xylem and phloem are called

        A. non vascular tissue
        B. vascular tissue
        C. smooth tissue
        D. supporting tissues


MCQ 975: The main source of carbohydrates for various animals is

        A. starch
        B. glycogen
        C. agar
        D. pectin


MCQ 976: The oval lump of slimy food mass which is partly digested is called

        A. bolus
        B. chyme
        C. juice
        D. feces


MCQ 977: The type of cleavage in a bird's egg is known as

        A. endodermal cleavage
        B. discoidal cleavage
        C. double cleavage
        D. multiple cleavage


MCQ 978: Imperfect fungi lack sexual reproduction and possess special genetic recombination, called

        A. parasexuality
        B. bisexuality
        C. homosexuality
        D. heterosexuality


MCQ 979: The reduction of progesterone level stimulates the pituitary gland to produce

        A. oxytocin
        B. thyroxine
        C. adrenaline
        D. epinephrine


MCQ 980: Arthropods have well developed excretory system, which is composed of

        A. nephridia
        B. annus
        C. setae
        D. Malpighian tubules


MCQ 981: Bilobed-mass composed of two ganglia in Planaria is a substitute of

        A. spinal cord
        B. brain
        C. network of neurons
        D. none of the others


MCQ 982: Enzymes are capable of recognizing and reacting with a special chemical substance called

        A. activator
        B. substrate
        C. cofactor
        D. coenzyme


MCQ 983: Five Kingdom system was modified by Margulies and

        A. Schwartz
        B. Robert
        C. F.Sanger
        D. David


MCQ 984: To study epilepsy, a test is conducted called

        A. spectrography
        B. chromatography
        C. lithotripsy
        D. electroencephalography


MCQ 985: In unfavorable environmental conditions, a seed may have to face

        A. water scarcity only
        B. low temperature only
        C. abundant water supply
        D. water scarcity and low temperature


MCQ 986: The mammalian ancestors and reptiles lived together in Jurassic times hence called

        A. mammals
        B. reptiles
        C. mammals like reptiles
        D. amphibians


MCQ 987: Number of pairs of spinal nerves humans have is

        A. 30
        B. 29
        C. 32
        D. 31


MCQ 988: The blue light-sensitive pigments found in plants are called

        A. Phytochromes
        B. chlorophylls
        C. anthocyanins
        D. carotenes


MCQ 989: The cell wall components do not dissolve in water and instead increase in

        A. shape
        B. size
        C. volume
        D. colour


MCQ 990: The ten pair of apertures in the tracheal trunk of cockroach is called

        A. tracheaoles
        B. tracheae
        C. spiracles
        D. gizzard


MCQ 991: A very important organelle which is also called the powerhouse of the cell is

        A. mitochondria
        B. golgi complex
        C. nucleus
        D. cell membrane


MCQ 992: Sarcoplasm of the skeletal muscles fiber is composed of

        A. glycogen only
        B. myoglobin only
        C. globulin
        D. glycogen and myoglobin


MCQ 993: Seizing and swallowing type of macrophagous feeding is done in

        A. ray fish
        B. eel
        C. dog fish
        D. lion fish


MCQ 994: Gallstones are produced by the precipitation of

        A. vitamins
        B. proteins
        C. cholesterol
        D. fructose


MCQ 995: The cytoplasm is cut underneath and is separated from the yolk by

        A. third cleavage
        B. first cleavage
        C. fourth cleavage
        D. fifth cleavage


MCQ 996: The color of the bile is

        A. red
        B. blue
        C. pink
        D. green


MCQ 997: The common name for Madrepora is

        A. sponges
        B. corals
        C. sycon
        D. urchins


MCQ 998: The undulating waves of contraction and relaxation of muscles help Nematodes in

        A. excretion
        B. digestion
        C. locomotion
        D. none of others


MCQ 999: In a coordination system, all spinal nerves are

        A. motor nerves
        B. sensory nerves
        C. mixed nerves
        D. spinal nerves


MCQ 1000: The enzymes which are helpful in cellular respiration is found in

        A. Golgi complex
        B. chloroplast
        C. mitochondria
        D. RNA


MCQ 1001: The movements which occur upon contact are called

        A. thermo nasty
        B. photo nasty
        C. chemonasty
        D. hyponasty


MCQ 1002: Microbiologists have divided bacteria into two major groups eubacteria and

        A. prokaryotic bacteria
        B. archaebacterial
        C. free bacteria
        D. inverted bacteria


MCQ 1003: Telencephalon and diencephalon are two sub-divisions of

        A. mid-brain
        B. fore brain
        C. hind brain
        D. brain


MCQ 1004: Ovulation is suppressed by which hormone?

        A. progesterone
        B. oxytocin
        C. oestrogen
        D. testosterone


MCQ 1005: The disease which may tend to run in families due to genetic disposition is

        A. parkinson's disease
        B. arthritis
        C. epilepsy
        D. alzheimer's disease


MCQ 1006: In human females, the periodic reproductive cycle is completed in approximately

        A. 10 days
        B. 18 days
        C. 28 days
        D. 40 days


MCQ 1007: If there is a tuft of flagella on both two poles of bacteria, it is called as

        A. Amphitrichous
        B. Lophotrichous
        C. Monotrichous
        D. Peritrichous


MCQ 1008: The base plate of a bacteriophage is attached to tail fibers which are in number

        A. 4
        B. 6
        C. 8
        D. 9


MCQ 1009: Rapid folding of the leaflets upon touching is shown in

        A. mimosa
        B. adiantum
        C. liver-worts
        D. mosses


MCQ 1010: In a chemical reaction, when alcohol and acid react together releasing a water molecule, the compound is formed, named as

        A. ether
        B. ester
        C. enzyme
        D. glycerol


MCQ 1011: The group of animals which feed on their mother's milk is called

        A. birds
        B. arthropods
        C. mammals
        D. reptiles


MCQ 1012: The cells which are present in seed coats and nutshells which provide protection are

        A. fibers
        B. tracheids
        C. sclereides
        D. vessels


MCQ 1013: The people who deal with the living things and non-living things which affect the living things in any way are known as

        A. scientist
        B. lawyers
        C. biologists
        D. physicians


MCQ 1014: The largest group of arthropods exists in the class

        A. Insecta
        B. Arachnida
        C. Myriapodia
        D. Chordata


MCQ 1015: After the contraction of ventricular muscles, the blood is moved via a swollen portion called

        A. sinus venosus
        B. conus arteriosus
        C. superior vena cava
        D. inferior venacava


MCQ 1016: Cranium consists of 8 bones in which

        A. 2 unpaired, 4 paired
        B. 4 unpaired, 2 paired
        C. 2 unpaired, 3 paired
        D. 6 unpaired,1 paired


MCQ 1017: The molecules which have one or more polypeptide chains in the form of fibrils are called

        A. Fibrous proteins
        B. globular proteins
        C. Glandular Tissue
        D. complex proteins


MCQ 1018: The exoskeleton of colonial coelenterates take lime from

        A. river
        B. sea
        C. pond
        D. waterfall


MCQ 1019: Gametophyte doesn't undergo reshuffling of genes because gametes are produced by

        A. division
        B. mitosis
        C. meiosis
        D. conjugation


MCQ 1020: The no. of lobes of the pituitary gland is

        A. 1
        B. 2
        C. 3
        D. 4


MCQ 1021: The masses of dilated, tortuous veins in the anorectal mucosa are called

        A. hemorrhoids
        B. ulcer
        C. poisoning
        D. all of above


MCQ 1022: Budding is a method of asexual reproduction found in

        A. hydra
        B. honey bee
        C. bacteria
        D. virus


MCQ 1023: The external skeleton of arthropods are composed of

        A. calcium
        B. silicates
        C. chitin
        D. minerals


MCQ 1024: The water transpiration is done 90% by the process of

        A. cuticular transpiration
        B. lenticular transpiration
        C. stomatal transpiration
        D. sweating


MCQ 1025: Pollination and dispersal of seeds is usually done by the help of

        A. chloroplast
        B. chromoplast
        C. chlorophyll
        D. chromophyll


MCQ 1026: Prolonged high blood pressure weakens the heart muscles by damaging the lining of

        A. blood vessels
        B. heart attack
        C. lungs
        D. liver


MCQ 1027: The lower layer of cells formed after splitting of blastoderm is called

        A. epiblast
        B. hypoblast
        C. area pellucida
        D. area opaca


MCQ 1028: Work on embryonic induction was reported by

        A. Hans Spemann only
        B. Hilde mangold only
        C. Hans Driesch
        D. Hans Spemann and Hilde mangold


MCQ 1029: When an insect comes on a leaf of the insectivorous plant with stiff bristles, the lobes come together with bristles

        A. open
        B. partly open
        C. unlocked
        D. interlocked


MCQ 1030: Galls are growths on plants induced by

        A. insects
        B. pathogens
        C. parasites
        D. all of above


MCQ 1031: The biological clock once stimulated produces a hormone for initiating flowering that is

        A. cytokinin
        B. florigen
        C. auxin
        D. ethene


MCQ 1032: Negative physiological changes in our body can be termed as

        A. growth
        B. aging
        C. breakdown
        D. death


MCQ 1033: Which is true about Cardiac muscles?

        A. striated only
        B. involuntary only
        C. voluntary
        D. striated and involuntary


MCQ 1034: The triple layer of membranes covering the brain and spinal cord are called

        A. meninges
        B. pelage
        C. pericardium
        D. plasma membranes


MCQ 1035: The more resistant hyphal wall in Fungi is

        A. chitin
        B. hyphae
        C. parasitic
        D. symbionic


MCQ 1036: Under secretion of somatotrophin hormone causes

        A. yellowing of skin
        B. gigantism
        C. dwarfism
        D. arthritis


MCQ 1037: A set of characteristics that separates a living organism from non-living objects(including dead organisms) is called

        A. science
        B. life
        C. biology
        D. evolution


MCQ 1038: The lobed structure which is present at the mouth of the alimentary canal of annelids is termed as

        A. nephridia
        B. mucus
        C. anus
        D. prostomium


MCQ 1039: Blue-green algae and bacteria belong to the kingdom

        A. animalia
        B. Monera
        C. protista
        D. protozoa


MCQ 1040: In earthworm, the fluid-filled compartments are separated by

        A. lumps
        B. septa
        C. nephrostome
        D. webs


MCQ 1041: The seminal fluid or semen provides

        A. liquid medium to sperms
        B. protection to sperms
        C. nourishment to sperms
        D. all of above


MCQ 1042: Behavior is mainly divided into how many types?

        A. three
        B. two
        C. four
        D. five


MCQ 1043: A solid mass of blood constituent which acts as a barrier in a blood vessel is called

        A. thrombus
        B. embolus
        C. imbolus
        D. serum


MCQ 1044: Spleen, thymus, tonsils, and adenoids produce

        A. erythrocytes
        B. thrombocytes
        C. phagocytes
        D. lymphocytes


MCQ 1045: Porphyrin ring in hemoglobin molecules contain which atom in their centers?

        A. magnesium
        B. iron
        C. hydrogen
        D. nickel


MCQ 1046: On which Photorespiration depends upon?

        A. heat
        B. light
        C. chemical
        D. Enzyme


MCQ 1047: A disease which is transmitted to people by the bites from rabid dogs and cats is

        A. rabies
        B. mental retardness
        C. fever
        D. epilepsy


MCQ 1048: Two long polypeptide chains coiled together to form

        A. myosin tail
        B. actin tail
        C. frectin tail
        D. none of others


MCQ 1049: Sperms of sponges are released in water and taken to eggs by

        A. amoeboid cells
        B. pseudopodia
        C. mesoglea
        D. algae


MCQ 1050: The groups of similar cells that are arranged into loose sheets or bundles are called

        A. cells
        B. tissues
        C. organs
        D. organelles


MCQ 1051: The sense organs which are present on the lips at anterior ends are called

        A. flame cell
        B. nematocysts
        C. flagella
        D. papillae


MCQ 1052: Coral islands and coral needs are formed by the skeleton of

        A. coral
        B. sea urchin
        C. sea anemone
        D. jelly fish


MCQ 1053: The key feature of identical twins is that they are

        A. genetically different
        B. genetically identical
        C. produced from two different eggs
        D. all of above


MCQ 1054: The opening of ileum into the large intestine is called

        A. ileocolic sphincter
        B. cardiac sphincter
        C. inverted sphincter
        D. all of above


MCQ 1055: Spermatogonia are produced by repeated division by the cells of

        A. vas deferens
        B. symphysis pubis
        C. germinal epithelium
        D. rectum


MCQ 1056: Pepsinogen is secreted by the cells called

        A. zymogens
        B. oxyntic
        C. parietal
        D. mucous


MCQ 1057: For maximum growth, the optimum temperature is

        A. 25-30 °C
        B. 10-20 °C
        C. 10-15 °C
        D. 10-50 °C


MCQ 1058: Archaeopteryx has much resemblance to dinosaurs and each wing had

        A. 3 claws
        B. 4 claws
        C. 5 claws
        D. 2 claws


MCQ 1059: The transfer of a genetic message from the nucleus to the ribosome in the cytoplasm is done by

        A. mRNA
        B. tRNA
        C. rRNA
        D. nRNA


MCQ 1060: Arthritis is chronic in

        A. osteoarthritis
        B. rheumatoid arthritis
        C. gouty arthritis
        D. all of above


MCQ 1061: Hormones which control the secretion of hormones in many other endocrine glands are

        A. adrenals
        B. parathyroid
        C. gonads
        D. tropic hormones


MCQ 1062: The exoskeleton is hardened outer covering which is

        A. inert
        B. non-living
        C. attached to internal muscles
        D. all of above


MCQ 1063: In the male reproductive system, the testicles are inside a sac called

        A. bladder
        B. scrotum
        C. rectum
        D. glans


MCQ 1064: A system for naming any classifying all organisms were given by

        A. Edward Jenner
        B. Carlous Linnaeus
        C. Robert brown
        D. John


MCQ 1065: Antagonistic to gibberellins, flowering is promoted in short-day plants by

        A. ethane
        B. abscisic acid
        C. cytokinins
        D. auxins


MCQ 1066: In catabolic series of reaction, the complex molecules are broken down into smaller molecules releasing

        A. water
        B. oxygen
        C. energy
        D. nutrients


MCQ 1067: During the night, a plant has Phytochrome in the form of

        A. p730
        B. P660
        C. p700
        D. p660


MCQ 1068: At present, the number of people over age 75 is

        A. 5 million
        B. 6 million
        C. 7 million
        D. 8 million


MCQ 1069: The uterine tube or fallopian tube opens into the

        A. oviduct
        B. cervix
        C. uterus
        D. vagina


MCQ 1070: The constriction and hardening of arteries occur in a condition known as

        A. Arteriosclerosis
        B. Atherosclerosis
        C. Venusclerosis
        D. all of above


MCQ 1071: Insects which eat dead animals and vegetables are known as

        A. parasites
        B. hermaphrodite
        C. actinipods
        D. scavengers


MCQ 1072: The normal speed of nerve impulse in humans is

        A. 100 meters per second
        B. 200 meters per second
        C. 50 meters per second
        D. 75 meters per second


MCQ 1073: The cell had no nucleus was termed as

        A. nucleated cell
        B. de-nucleated cell
        C. degenerated cell
        D. a nucleate cell


MCQ 1074: In the case of no fertilization, what happens?

        A. progesterone secretion diminishes
        B. progesterone's spongy effect on endometrium reduces
        C. endometrium suffers a breakdown
        D. all of above


MCQ 1075: The pollen of pinus can float in the air for a longer period due to the presence of

        A. oxygen
        B. wings
        C. tail
        D. seed coat


MCQ 1076: Neurotransmitter molecules after being released bind to the receptors in the

        A. pre-synaptic membrane
        B. post-synaptic membrane
        C. synaptic cleft
        D. cell body


MCQ 1077: The large intestine is composed of

        A. caecum
        B. colon
        C. rectum
        D. all of above


MCQ 1078: Uric acid is an excretory product of animals from

        A. reptiles only
        B. birds only
        C. amphibians
        D. reptiles and birds


MCQ 1079: The internal hydrostatic pressure produced by osmosis is called

        A. turgor pressure
        B. air pressure
        C. water pressure
        D. hydraulic pressure


MCQ 1080: Sponges belong to which class of kingdom Animalia?

        A. sessile
        B. parasite
        C. prokaryotes
        D. eukaryotes


MCQ 1081: The structure in which a ribose sugar will form five cornered ring is called

        A. Ribofuranose
        B. Glucopyramose
        C. fructose
        D. glucose


MCQ 1082: The metabolic pathway in the production of urea from nitrogenous waste is known as

        A. Krebs cycle
        B. ammonia cycle
        C. urea cycle
        D. urea cycle


MCQ 1083: Light energy is absorbed by the pigment molecules present on

        A. Antenna pigment
        B. Antenna complex
        C. Photo system
        D. Cuticle


MCQ 1084: Water is 50 times more viscous than

        A. oil
        B. alcohol
        C. gases
        D. solid


MCQ 1085: Proteins combine with fat molecules in lymph vessels to form

        A. proteins
        B. lipids
        C. lipo-proteins
        D. polypeptide


MCQ 1086: Symptoms of Alzheimer's disease are similar to those diseases that cause

        A. epilepsy
        B. dementia
        C. depression
        D. split personality disorder


MCQ 1087: A molecular structure of sugar which contains 6 carbon is known as

        A. fructose
        B. sucrose
        C. glucose
        D. lactose


MCQ 1088: Chromosome doubling in every generation reproducing sexually is prevented by

        A. meiosis only
        B. reduction division only
        C. mitosis
        D. meiosis and reduction division


MCQ 1089: The chemotherapeutic chemical substances which are used to treat infectious diseases are

        A. antiseptics
        B. antibiotics
        C. antifungal
        D. anti inflammatory


MCQ 1090: The cylindrical animals which are nutritive in function are polyps of cnidarian and named as

        A. rhizoids
        B. gastrozoids
        C. liquizoid
        D. all of above


MCQ 1091: The growth of mycobacterium is accelerated in

        A. nutritious conditions
        B. hygienic conditions
        C. unhygienic conditions
        D. malnutrition


MCQ 1092: Disc slip can be treated by

        A. bed rest
        B. traction
        C. painkiller
        D. all of above


MCQ 1093: The plant which shed its leaves to restrict transpiration is

        A. rose
        B. balsam
        C. cacti
        D. conifer


MCQ 1094: Alpha carbon is attached with an amino group on one side and the other side is attached to a

        A. carboxyl group
        B. ester group
        C. alcohol
        D. acetic group


MCQ 1095: Internal fertilization is advantageous because it protects the fertilized egg from

        A. dehydration
        B. predation
        C. harsh environment
        D. all of above


MCQ 1096: During dark reactions, the energy is stored in the molecules of

        A. carbon
        B. oxygen
        C. sugar
        D. hydrogen


MCQ 1097: If bile pigments accumulate in the blood, it can cause

        A. cancer
        B. hepatitis
        C. jaundice
        D. measles


MCQ 1098: Antoine Van Leeuwenhoek described the microbes like bacteria and protozoa and called them as

        A. animalcules
        B. macromolecules
        C. micromolecules
        D. planolecules


MCQ 1099: The most commonly found sugars are pentose and

        A. hexoses
        B. tetroses
        C. triodes
        D. heptoses


MCQ 1100: Kidneys remove nitrogenous wastes and act as a

        A. excretory product
        B. Osmoregulators organ
        C. osmoconformers
        D. thermoregulatory organs


MCQ 1101: A virus which is passed on to progeny cells after being incorporated in the host genome is called

        A. retrovirus
        B. provirus
        C. bacteriophage
        D. capsid


MCQ 1102: The release of oxytocin during labor pain occurs in the form of

        A. packets
        B. stream
        C. waves
        D. rays


MCQ 1103: Proteins are synthesized within the mitochondria that's why it is called

        A. self-duplication
        B. self-replication
        C. self-multiplication
        D. self-division


MCQ 1104: Viviparity is a feature of

        A. birds
        B. fish
        C. mammals
        D. reptiles


MCQ 1105: The literal meaning of gymnosperms is

        A. naked seeds
        B. grown seeds
        C. whole seeds
        D. dormant seeds


MCQ 1106: Cellulose constitutes the important part of plant cell called

        A. cell wall
        B. cell membrane
        C. mitochondria
        D. Golgi complex


MCQ 1107: The basic element of the organic compound is

        A. hydrogen
        B. carbon
        C. oxygen
        D. all of above


MCQ 1108: The fact that each cell contains all the genetic information of the original zygote was proved by

        A. Spemann
        B. Hammerlings
        C. Hans Driesch
        D. Darwin


MCQ 1109: In transportation, Granulocytes include

        A. neutrophils
        B. eosinophils
        C. basophils
        D. all of above


MCQ 1110: Secondary sexual characteristics in females are caused by

        A. androgen
        B. oestrogen
        C. oxytocin
        D. thyroxine


MCQ 1111: Into how many types, Thorpe classified learning behavior

        A. two
        B. four
        C. five
        D. six


MCQ 1112: In the differentiation process, cambium responsible for secondary growth is recognized during stage

        A. one
        B. two
        C. three
        D. four


MCQ 1113: Recent studies prove that development depends on the position of

        A. nucleus
        B. white matter
        C. gray crescent
        D. yolk


MCQ 1114: The fusion of the vertebral joint causing immobility is

        A. rickets
        B. sciatica
        C. spondylosis
        D. Arthritis


MCQ 1115: The process of formation of the central nervous system is called

        A. gastrulation
        B. centralization
        C. neurulation
        D. blastulation


MCQ 1116: All living things undergo one of the essential property to remove waste material is

        A. digestion
        B. excretion
        C. respiration
        D. regulation


MCQ 1117: Morula has a disc-shaped mass of cells having two or more layers in thickness called

        A. blastoderm
        B. epiblast
        C. hypoblast
        D. somatic mesoderm


MCQ 1118: Excess melanophore stimulating hormone is secreted in

        A. parkinson's disease
        B. alzheimer's disease
        C. Addison's disease
        D. epilepsy


MCQ 1119: The cerebellum is best developed in

        A. planaria
        B. rodents
        C. human
        D. birds


MCQ 1120: Amygdala is involved in the

        A. formation of long-term memory
        B. learning
        C. feelings of fear and rage
        D. thinking


MCQ 1121: There is a reduction as well as oxidation during photosynthesis hence called as

        A. redox process
        B. oxidative reaction
        C. reduction
        D. neutral process


MCQ 1122: Mammals which give birth to the young ones of their kind are called

        A. oviparous
        B. viviparous
        C. ovoviviparous
        D. viparous


MCQ 1123: The key feature in vernalization is

        A. high temperature
        B. low temperature
        C. low moisture
        D. high humidity


MCQ 1124: A set of organelles contain

        A. mitochondria, Golgi complex and nucleus
        B. mitochondria, neutron and DNA
        C. mitochondria, glucose and electron
        D. nerve, tissue and stomach


MCQ 1125: Fertilization that occurs outside the body of an organism is called

        A. internal fertilization
        B. external fertilization
        C. copulation
        D. pollination


MCQ 1126: The animals which excrete uric acid are called as

        A. ammonotelic
        B. ureotelic
        C. uricotelic
        D. urinotelic


MCQ 1127: Cholesterol acts as a precursor of

        A. steroid hormones
        B. lymphs nodes
        C. enzymes
        D. organic nutrients


MCQ 1128: Pseudomonas is an example of bacteria which is

        A. aerobic
        B. anaerobic
        C. facultative
        D. parasitic


MCQ 1129: Green sulfur bacteria and purple sulfur bacteria are examples of

        A. photosynthetic bacteria
        B. chemosynthetic bacteria
        C. heterotrophic
        D. autotrophic


MCQ 1130: Freshwater animals are in contact mode of hydration with loss of

        A. nutrients
        B. salts
        C. potassium
        D. carbon


MCQ 1131: After the gaseous exchange, the air is removed by the process of

        A. inhalation
        B. inspiration
        C. exhalation
        D. all of above


MCQ 1132: The pituitary gland is also known as

        A. hyperphysis cerebri
        B. hypomixis cerebri
        C. hypophysis cerebri
        D. hypermixis cerebri


MCQ 1133: Vaccination for specific disease helps the person to get

        A. healthy
        B. sick
        C. immune
        D. vulnerable


MCQ 1134: The movement of the young stem in a zigzag fashion is found in

        A. epinasty
        B. hyponasty
        C. nutation
        D. nutrition


MCQ 1135: Climbing vines follow the tropic movements of

        A. phototropism
        B. geotropism
        C. thigmotropism
        D. hydrotropism


MCQ 1136: The movement and re-arrangement of cells takes place in

        A. gastrulation
        B. neurulation
        C. blastulation
        D. all of above


MCQ 1137: Trypsin splits proteins into peptones and

        A. fatty acid
        B. glycerol
        C. polypeptides
        D. fats


MCQ 1138: The dormant, resistant bodies which develop during the differentiation of vegetative cells are

        A. pili
        B. cysts
        C. buds
        D. spores


MCQ 1139: The sponges for regeneration take

        A. seconds
        B. hours
        C. weeks
        D. months


MCQ 1140: Vasopressin hormone belongs to the family of

        A. amino acid and derivatives
        B. proteins
        C. polypeptides
        D. steroids


MCQ 1141: Light influences growth in how many ways?

        A. one
        B. two
        C. three
        D. four


MCQ 1142: Splitting of Adenosine triphosphate (ATP) is done by an associated enzyme called

        A. ATPase
        B. Catalase
        C. Lipase
        D. amylase


MCQ 1143: The tissue which is made up of dead cells in older stems is called

        A. bark
        B. lamina
        C. cork
        D. timber


MCQ 1144: Amphioxus is a sub-phylum of

        A. cephalochordate
        B. urochordata
        C. cyclostomata
        D. octeichtches


MCQ 1145: Palmitic acid has a melting point of

        A. 64.1 °C
        B. 63.1 °C
        C. 6.31 °C
        D. 61.3 °C


MCQ 1146: The best commercial sponges are found in the warm waters of

        A. Mediterranean sea
        B. Ocean
        C. Dead sea
        D. Red sea


MCQ 1147: One gram of ammonia to be excreted need water of about

        A. 400ml
        B. 100ml
        C. 500ml
        D. 250ml


MCQ 1148: The leaf which has long stiff bristles and a midrib between them is the feature of

        A. pitcher plant
        B. venus fly trap
        C. mosses
        D. ferns


MCQ 1149: The specificity destruction of antigen is done by

        A. antigens
        B. antibodies
        C. antireductants
        D. antioxidants


MCQ 1150: Transpiration that occurs from the vital organ lenticels present on the stem is termed as

        A. cuticular transpiration
        B. stomatal transpiration
        C. lenticular transpiration
        D. translocation


MCQ 1151: The cell membrane of a bacteria invaginates into the cytoplasm and form a structure called

        A. mesosome
        B. ribosomes
        C. spores
        D. plasmids


MCQ 1152: The first scientist to propose an objective definition of instincts in terms of animal behavior is

        A. Isaac newton
        B. Darwin
        C. uexkull
        D. Lorenz


MCQ 1153: The enzyme which digests starch into maltose is called

        A. amylase
        B. pepsin
        C. lipase
        D. Secretin


MCQ 1154: Parthenocarpy occurs due to hormonal imbalance usually due to high level of

        A. ethene in ovaries
        B. auxin in ovaries
        C. gibberellin in ovaries
        D. cytokinin in ovaries


MCQ 1155: The left cerebral hemisphere controls which side of the body?

        A. left
        B. right
        C. front
        D. dorsal


MCQ 1156: Between two neurons, a microscopic gap exists which is the contact point of neurons called

        A. node of ranvier
        B. neuron bridges
        C. synapse
        D. gaps


MCQ 1157: The organelle which deals with the formation of decomposition of hydrogen peroxide is called

        A. peroxisomes
        B. ribosome
        C. peroxides
        D. oxisomes


MCQ 1158: The specialized covering around megasporangium is called

        A. integuments
        B. sperms
        C. ovum
        D. ovary


MCQ 1159: Spirochaete, treponema pallidum causes

        A. gonorrhea
        B. syphilis
        C. genital herpes
        D. acquired immune deficiency syndrome (AIDS)


MCQ 1160: In the tip of root and shoot, young cells

        A. posses spherical nuclei
        B. are non-vacuolated
        C. posses nuclei in the center of cytoplasm
        D. all of above


MCQ 1161: Flowering is inhibited in short-day plants and promoted in long-day plants by

        A. yellow light
        B. red light
        C. blue light
        D. white light


MCQ 1162: The sieve-like plate structure which helps in circulation water through channels is called

        A. tube foot
        B. channels
        C. tubules
        D. madreporite


MCQ 1163: Bone lighter in weight and rich in blood vessels and highly porous is

        A. bone marrow
        B. sponge bone
        C. compact bone
        D. cartilage


MCQ 1164: If the higher temperature persists for a longer period, the plant may

        A. wilt
        B. grow
        C. flourish
        D. regrow


MCQ 1165: The technique in which blood is circulated through dialyzer is known as

        A. peritoneal dialysis
        B. hemodialysis
        C. renal dialysis
        D. all of above


MCQ 1166: The parasite which is responsible for dysentery in humans is known as

        A. aerobic amoeba
        B. entameoba
        C. entameoba histolytica
        D. aerophillic


MCQ 1167: The antibodies which are present in lymphocytes are synthesized by vertebrates in response to antigens are

        A. globulins
        B. immunoglobulins
        C. immune cells
        D. antigens


MCQ 1168: Tadpole larva of frog does not metamorphose, instead grows to a large-sized tadpole due to deficiency of

        A. parathyroid
        B. thyroxine
        C. oestrogen
        D. adrenals


MCQ 1169: The instincts are important for animals with

        A. no parental care
        B. long life span
        C. high parental care
        D. sedentary mode of life


MCQ 1170: A lichen which is used as food by animals like reminders are called

        A. animal lichen
        B. reindeer lichen
        C. reindeer fungi
        D. reindeer moss


MCQ 1171: The bones bend and deform due to lack of calcium salts deposition and lead to

        A. Osteomalacia
        B. hypercalcemia
        C. hypocalcaemia
        D. Osteoporosis


MCQ 1172: In the case of acute shortage of water, animals convert wastes into an excretory product which requires a minimum amount of water which is

        A. urea
        B. ammonia
        C. uric acid
        D. ammonium nitrate


MCQ 1173: The movement of water molecules along cell walls of xylem vessels is due to a force called

        A. root pressure
        B. guttation
        C. imbition
        D. bleeding


MCQ 1174: Eugenic aims are achieved by using a technology

        A. Cloning
        B. fertilizing
        C. tissue culturing
        D. budding


MCQ 1175: The body of sponges possess a single charity called

        A. sac
        B. spongocoel
        C. coelom
        D. mesoglea


MCQ 1176: Malaria is caused by the bite of an infected female

        A. Anopheles
        B. leech
        C. lice
        D. bee


MCQ 1177: Shoots follow the growth movements which is

        A. negative hydrotropism
        B. positive hydrotropism
        C. static hydrotropism
        D. neutral hydrotropism


MCQ 1178: Neurons at rest (non-conducting neuron) have electric potential called

        A. sleep membrane potential
        B. resting membrane potential
        C. passive membrane potential
        D. dormant membrane potential


MCQ 1179: The tobacco weakens the walls of

        A. alveoli
        B. bronchi
        C. bronchioles
        D. bronchus


MCQ 1180: Auxins promote cell division in

        A. epidermis
        B. cortex
        C. pith
        D. cambium


MCQ 1181: In humans, the reduced part of the brain is

        A. fore brain
        B. mid brain
        C. hind brain
        D. cerebral cortex


MCQ 1182: Pyrimidines are composed of cytosine, thiamine and

        A. guanine
        B. adenine
        C. uracil
        D. all of above


MCQ 1183: During active membrane potential Na+ ions diffuse into the neuron through

        A. active transport
        B. sodium bridges
        C. support proteins
        D. sodium gates


MCQ 1184: For each impulse autonomic nervous system utilizes only

        A. four neurons and two ganglion
        B. two neurons and one ganglion
        C. one neuron and one ganglion
        D. one neuron and two ganglions


MCQ 1185: Flagellates which are sessile, marine and their single flagellum is covered by a collar is called

        A. tetrad
        B. choanoflagellates
        C. flagellates
        D. biflagellate


MCQ 1186: The ratio of mRNA of a total RNA in the cell is

        A. 3-4%
        B. 3-6%
        C. 3-8%
        D. 0.03


MCQ 1187: The synthesis of ATP by the initiation of reaction with light is called

        A. photophosphorylation
        B. photolysis
        C. photo system
        D. photosynthesis


MCQ 1188: The structural and functional unit of the nervous system is

        A. receptors
        B. effectors
        C. brain
        D. neuron


MCQ 1189: The mammalian kidney is specialized to conserve water above

        A. 0.7
        B. 0.81
        C. 0.995
        D. 0.934


MCQ 1190: The stunted growth of plants is due to a deficiency of

        A. nitrogen
        B. phosphorus
        C. sodium
        D. magnesium


MCQ 1191: Efficient respiration is done in Hydra by the help of

        A. nematocysts
        B. enteron
        C. tentacles
        D. dendrites


MCQ 1192: Fertilization in young sporophyte which is first attached to gametophyte later becomes

        A. mutated
        B. indepdent
        C. fertilized
        D. developed


MCQ 1193: Na+ and K+ pumps in the cell membrane work due to

        A. splitting of H2O
        B. splitting of ATP
        C. splitting of glucose
        D. hydration of proteins


MCQ 1194: During the day, a plant possesses phytochrome of about

        A. p730
        B. p700
        C. p630
        D. p500


MCQ 1195: The megaspore which develops into female gametophyte consists of cells that are only

        A. 2
        B. 7
        C. 11
        D. 3


MCQ 1196: The cytoplasm is filled with 80% of

        A. salts
        B. water
        C. sugars
        D. air


MCQ 1197: The study of chemical components, as well as chemical processes that take place in a living organism, is

        A. Microbiology
        B. Biochemistry
        C. Fresh water biology
        D. Chemical biology


MCQ 1198: In the next half-century, the number of people over age 75 will rise from 8 million to

        A. 10 million
        B. 12.5 million
        C. 14.5 million
        D. 15.5 million


MCQ 1199: The ribosome is synthesized in the part of the cell called

        A. Golgi complex
        B. mitochondria
        C. nucleolus
        D. nucleus


MCQ 1200: Globular proteins are multiple folding of polypeptide chain hence their shape is

        A. round
        B. ellipsoidal
        C. spiral
        D. double helical


MCQ 1201: The removed ectoderm from a frog's embryo developed which one of these?

        A. individual frog
        B. frog with normal nervous system
        C. frog with defective nervous system
        D. frog with defective circulatory system


MCQ 1202: Effective drug for the treatment of Parkinson's disease is

        A. L-dopa
        B. m-dopa
        C. t-dopa
        D. k-dopa


MCQ 1203: Nourishing cells around ovule are called

        A. nucleus
        B. soma
        C. endocarp cells
        D. mesocarp cells


MCQ 1204: The stimuli which produce a response and are external are called

        A. Exogenous
        B. endogenous
        C. heterogeneous
        D. homogenous


MCQ 1205: In a mammal, the thyroid gland has lobes

        A. one in number
        B. two in number
        C. three in number
        D. four in number


MCQ 1206: Gene controlled substances are mostly present in the

        A. cell membrane
        B. cytoplasm
        C. cell wall
        D. nucleus


MCQ 1207: Photo tactic movement helps the chloroplast to retain maximum light for

        A. oxygen fixation
        B. CO2 fixation
        C. water fixation
        D. nitrogen fixation


MCQ 1208: Thymus gland makes the T-cells

        A. weak
        B. strong
        C. competent
        D. slow


MCQ 1209: The alternative path adopted by photoexcited electrons is

        A. cyclic electron flow
        B. non-cyclic electron flow
        C. cyclic neutron flow
        D. non-cyclic proton flow


MCQ 1210: The disease in which fluid-filled vesicles are formed on the body which takes the shape of pustules and leaves pitted scars is

        A. measles
        B. small pox
        C. mumps
        D. chicken pox


MCQ 1211: Cylinders of dividing cells contributing to secondary growth are called

        A. apical meristem
        B. intercalary meristems
        C. lateral meristems
        D. pith


MCQ 1212: The cap of Acetabularia crenulata is in which shape?

        A. regular
        B. circular
        C. irregular
        D. cone


MCQ 1213: The ability to reform its lost organ in animals is called as

        A. mitosis
        B. meiosis
        C. regeneration
        D. regrowth


MCQ 1214: The instrument which helps to measure the ability of a pigment to absorb light is called

        A. thermometer
        B. spectrophotometer
        C. hydrometer
        D. ceilometers


MCQ 1215: The built-in mechanism by which sign stimuli are recognized is called

        A. inner recognizing mechanism (IRM)
        B. innate recognizing mechanism (IRM)
        C. inner releasing mechanism (IRM)
        D. innate releasing mechanism (IRM)


MCQ 1216: In the center of the blastoderm, the cells are

        A. larger
        B. flattened
        C. smaller
        D. huge


MCQ 1217: The encapsulated ending which lies in papillae which extend into the ridges of fingerprints are

        A. Pacinian Corpuscles
        B. Free end corpuscles
        C. Meissner's Corpuscles
        D. Cellular corpuscles


MCQ 1218: The Urine is stored inside the body in a sac called

        A. scrotum
        B. bladder
        C. ureter
        D. urethra


MCQ 1219: The cell membrane is chemically composed of 40-60 % of

        A. fats
        B. lipids
        C. sugar
        D. cytosol


MCQ 1220: Single-ringed pyrimidines and double-ringed pyrimidines are types of

        A. aqueous bases
        B. strong bases
        C. weak bases
        D. nitrogenous bases


MCQ 1221: The anterior five vertebrae fuse to form

        A. sacrum
        B. coccyx
        C. embryo
        D. zygote


MCQ 1222: The elimination of nitrogenous waste from the body constitutes

        A. digestion
        B. elimination
        C. excretion
        D. regulation


MCQ 1223: Purine comprises of which one?

        A. adenine and guanine
        B. cytosine and thiamine
        C. adenine and uracil
        D. guanine and thiamine


MCQ 1224: The optimum Ph for Chymotrypsin is

        A. 8
        B. 7
        C. 7--8
        D. 7--9


MCQ 1225: If an Oligosaccharides is hydrolyzed, it will yield up to two to ten

        A. monosaccharides
        B. disaccharides
        C. oligosaccharides
        D. polysaccharides


MCQ 1226: Pupil dilation, digestion, and acceleration of heartbeat is done by

        A. somatic nervous system
        B. autonomic nervous system
        C. sympathetic nervous system
        D. para-sympathetic nervous system


MCQ 1227: Nervous spasm, convulsion, and psychotic delusion is a result of swallowing ergot-contaminated flour, this disease is known as

        A. histoplasmosis
        B. ergotism
        C. monogolism
        D. plasmolysis


MCQ 1228: The example of filter feeder plant is

        A. mussel
        B. aphids
        C. hydra
        D. mosquito


MCQ 1229: The sexual reproducing Platyhelminthes consists of both male and female organ on the same individual, hence called

        A. hermaphrodites
        B. homodites
        C. hetrodites
        D. homophrodites


MCQ 1230: Coxal bone is composed of which of the following?

        A. ilium
        B. ischium
        C. pubis
        D. all of above


MCQ 1231: White matter is made up of

        A. non-myelinated nerve fibers
        B. cell bodies only
        C. myelinated nerve fibers
        D. dendrites only


MCQ 1232: The fetus inside mother is nourished via

        A. skin
        B. food pipe
        C. placenta
        D. stomach


MCQ 1233: The stinging cells which are produced from cnidocytes are called

        A. cnidarians
        B. nematocysts
        C. leukocytes
        D. thrombocytes


MCQ 1234: No absorption of water and salts takes place in the condition known as

        A. constipation
        B. diarrhea
        C. dehydration
        D. malaria


MCQ 1235: The turgor pressure keeps the plant rigid and resistant to

        A. heat
        B. bending
        C. insects
        D. light


MCQ 1236: The passing out of placenta after birth is called

        A. after birth
        B. break down
        C. birth release
        D. birth exit


MCQ 1237: Peristaltic contractions lead to

        A. vomiting
        B. hunger pangs
        C. constipation
        D. food poisoning


MCQ 1238: The shape of the head of a bacteriophage is

        A. spiral
        B. elongated
        C. pyramidal
        D. elongated pyramidal


MCQ 1239: In the estrous cycle, the hormone that prepares the uterus for conception is

        A. testosterone
        B. androgen
        C. estrogen
        D. thyroxine


MCQ 1240: Carbon dioxide is essential for plants to carry out the process of

        A. flowering
        B. transpiration
        C. photosynthesis
        D. evapotranspiration


MCQ 1241: The most important metabolic activities of all organisms are

        A. digestion
        B. excretion
        C. respiration
        D. ingestion


MCQ 1242: The elevated levels of calcium in blood lead towards

        A. hypocalcaemia
        B. hypercalcemia
        C. hyperoxaluria
        D. hypertension


MCQ 1243: The comparison between the sediment layers can inform us about

        A. age of fossils
        B. weight of fossils
        C. shape of fossils
        D. density of fossils


MCQ 1244: In the ovary, the second meiotic division occurs in the

        A. primary oocyte
        B. oogonia
        C. secondary oocyte
        D. ovum


MCQ 1245: The second pay off phase of cellular respiration is called

        A. preparatory phase
        B. net phase
        C. respiratory phase
        D. oxidative phase


MCQ 1246: The acute form of Arthritis can be treated by

        A. Estrogen Replacement Therapy
        B. sun exposure
        C. surgery
        D. antibiotics


MCQ 1247: The vascular bundles possess bundle cap to strengthened additionally in

        A. balsam
        B. venus fly trap
        C. sun flower
        D. rose


MCQ 1248: Cats and dogs are an example of

        A. herbivores
        B. carnivores
        C. detritivores
        D. omnivores


MCQ 1249: The monosaccharides obtained as a result of hydrolysis of oligosaccharides are the covalent bond between them, which is called

        A. ionic bond
        B. covalent bond
        C. coordinate covalent bond
        D. glycosidic bond


MCQ 1250: Fatty acids which remain in a liquid state at room temperature are said to be

        A. wax
        B. oil
        C. fats, glucose, starch
        D. lipids


MCQ 1251: Human embryo remains enclosed in a sac called

        A. scrotum
        B. pericardium
        C. placenta
        D. amniotic sac


MCQ 1252: The sclerenchymatous cells are heavily lignified in

        A. xylem
        B. phloem
        C. cortex
        D. cuticle


MCQ 1253: Which one is true about Auxins?

        A. promote apical dominance
        B. promote fruit growth
        C. induce parthenocarpy
        D. all of above


MCQ 1254: 50 ml of water is needed to remove nitrogen in urea that is

        A. 1g
        B. 2g
        C. 3g
        D. 0.5g


MCQ 1255: In plants with alternation of generation, meiosis occurs during

        A. transportation
        B. sporogenesis
        C. parthenogenesis
        D. pollination


MCQ 1256: If the entire cell or organism shows the response to the stimulus of light, the phenomenon is

        A. chemo tactic movement
        B. photo tactic movement
        C. sleep movements
        D. rapid movements


MCQ 1257: The mechanism that produces new generations and maintains a species is

        A. inheritance
        B. reproduction
        C. heredity
        D. budding


MCQ 1258: ATP and proteins are supplied to companion cells via

        A. sieve tubes
        B. porous wall
        C. cell wall
        D. vascular tissue


MCQ 1259: For the synthesis of 10 g of glucose, a plant may need the amount of solar energy equals to

        A. 712.6
        B. 717.6
        C. 716.2
        D. 71.76


MCQ 1260: The receptors which detect stimuli of touch pressure are

        A. Chemoreceptors
        B. Nociceptors
        C. Mechanoreceptors
        D. Thermoreceptors


MCQ 1261: Identical twins are the result of

        A. meiotic division
        B. non-disjunction of chromosomes
        C. mitotic division
        D. disjunction of chromosomes


MCQ 1262: The aggregation of individuals that perform different functions constitutes a

        A. population
        B. medusae
        C. colony
        D. specie


MCQ 1263: The defense against diseases is facilitated by the help of

        A. antigens
        B. antibodies
        C. immunoglobulins
        D. thrombocytes


MCQ 1264: Organic compounds of varying structural complexity poured directly into the blood to act on target tissues are

        A. hormones
        B. enzymes
        C. inorganic ions
        D. nerve impulses


MCQ 1265: The effect that instantly kills the microbes is

        A. sterilization
        B. microbicide
        C. antiseptic
        D. antibiotic


MCQ 1266: The grey mud which gradually turns into chalk is dead

        A. foramferans
        B. miniferans
        C. foraminiferans
        D. macroferans


MCQ 1267: If the glomerulus part of nephrons is destroyed by pathogens, it results in the elevated levels of urea and nitrogenous waste in

        A. plasma level
        B. blood vessels
        C. capillaries
        D. veins


MCQ 1268: The zygote contains complete information about the individual in the form of

        A. karyotype
        B. mitochondria
        C. genome
        D. cytoplasm


MCQ 1269: The dense fluid-filled region which helps in producing carbohydrate molecules is called

        A. lumen
        B. carpel
        C. stroma
        D. grana


MCQ 1270: If a tiny outgrown bud detach and grow individually on its own by asymmetric division, this is called

        A. binary fission
        B. grafting
        C. budding
        D. multiple fission


MCQ 1271: Auxins promote growth at a very low concentration in

        A. shoots
        B. roots
        C. flowers
        D. nodes


MCQ 1272: If somatotrophin hormone is produced in excess during early life, it leads to

        A. abnormal development of hands, jaws, feet
        B. cleft palate
        C. epilepsy
        D. gigantism


MCQ 1273: In cross-section, the gray matter in the spinal cord is seen in the shape of a

        A. tree
        B. apple
        C. butterfly
        D. egg


MCQ 1274: The feed of macrophages and neutrophils are

        A. red blood cells (RBC)
        B. white blood cells (WBC)
        C. platelets
        D. foreign invaders


MCQ 1275: Which is true about smooth muscles?

        A. visceral
        B. non-striated
        C. involuntary
        D. all of above


MCQ 1276: The secretory glands of the plants are called

        A. lymphs
        B. enzymes
        C. hydathodes
        D. plasmodesmota


MCQ 1277: The female sex organs in a plant of Bryophyta is known as

        A. archegonia
        B. spermatogonia
        C. endotherms
        D. none of others


MCQ 1278: After the food reaches the back of the mouth, swallowing becomes

        A. voluntary
        B. involuntary
        C. automatic
        D. mobile


MCQ 1279: Animals which generate heat on their own during metabolism are

        A. ectoderms
        B. exotherms
        C. endotherms
        D. self ectotherms


MCQ 1280: The functional types of neurons are

        A. two
        B. four
        C. three
        D. five


MCQ 1281: An example of unicellular non-motile green algae is

        A. brown algae
        B. chlorella
        C. green algae
        D. super blue algae


MCQ 1282: When the walls of the duodenum are eaten away by its mucus layer, it results in a/an

        A. sore only
        B. ulcer only
        C. bleeding
        D. sore and ulcer


MCQ 1283: Shelf fungus parasitize trees, are important decomposers of

        A. wood
        B. leaves
        C. bark
        D. roots


MCQ 1284: The inflammatory chemicals which give rise to severe contractions of bronchioles in asthma are

        A. peroxisomes
        B. amino acids
        C. histamines
        D. nicotine


MCQ 1285: Numerous micro-organisms which may be infectious proteins are the

        A. clones
        B. virions
        C. bacteriophage
        D. prions


MCQ 1286: The extensions of lungs which are extended in bones are known as

        A. syrinx
        B. claws
        C. air-sacs
        D. alveoli


MCQ 1287: The indigested food in cockroaches are stored for some time in

        A. stomach
        B. mid gut
        C. rectum
        D. gizzard


MCQ 1288: Leaf and shoot primordia develop from

        A. apical meristematic cells
        B. pericyclic
        C. endoderm cells
        D. mesoderm cells


MCQ 1289: The other name for "blue-green algae" is

        A. cyanobacteria
        B. green bacteria
        C. blue bacteria
        D. bruno bacteria


MCQ 1290: The cell divisions are enhanced by the effect of

        A. red light
        B. blue light
        C. white light
        D. yellow light


MCQ 1291: Secretin stimulates the secretions that are

        A. peptic only
        B. pancreatic only
        C. intestinal
        D. peptic and pancreatic


MCQ 1292: The nervous system of hydra is a network of neurons, present between the

        A. ectoderm and mesoderm
        B. ectoderm and endoderm
        C. endoderm and mesoderm
        D. mesoderm and pericarp


MCQ 1293: The ribs and intercostal muscles constitute the walls of

        A. diaphragm
        B. lungs
        C. ribs
        D. chest


MCQ 1294: The internal structure of the stem lacks

        A. xylem
        B. phloem
        C. pith
        D. cortex


MCQ 1295: Which of the following involved sexual reproduction?

        A. mitosis
        B. budding
        C. meiosis
        D. tubers


MCQ 1296: The general names for the group of diseases are

        A. mycobacterium
        B. tuberculosis
        C. mycobacterium-tuberculosis
        D. tuberculositic virus


MCQ 1297: HIV target the major cells in the human body known as

        A. C-lymphocytes
        B. D-lymphocytes
        C. E-lymphocytes
        D. T-lymphocytes


MCQ 1298: If the cap of Acetabularia is removed,

        A. alga dies
        B. two new caps are produced
        C. alga still lives without cap
        D. new cap is regenerated


MCQ 1299: The metabolically dormant bodies of bacteria are resistant to adverse physical environmental conditions are the

        A. spores
        B. mesosome
        C. ribosomes
        D. plasmids


MCQ 1300: Ropes are made from leaves of

        A. Saccharum munja
        B. citratus
        C. bambusa
        D. none of others


MCQ 1301: The stabbing paint due to injury of the proximal sciatic nerve is a disease

        A. rickets
        B. sciatica
        C. spondylosis
        D. arthritis


MCQ 1302: The earliest group of rootless plants are the one which becomes

        A. developed
        B. alternated
        C. extinct
        D. enlarged


MCQ 1303: The non-cellular part of hydra is

        A. ectoderm
        B. endoderm
        C. mesoglea
        D. tentacles


MCQ 1304: The increase in the intensity of light increases the rate of

        A. cell enlargement
        B. cell divisions
        C. maturation
        D. differentiation


MCQ 1305: Most common food poisoning is caused by bacteria

        A. salmonella only
        B. campylobacter only
        C. cambioloma
        D. salmonella and campylobacter


MCQ 1306: The embryo at a two-celled stage has

        A. two blastomeres
        B. two gastromeres
        C. two centromere
        D. three blastomeres


MCQ 1307: Compact bone constitutes the outer shell and provides an attachment site for

        A. tissue
        B. cell
        C. cartilage
        D. muscle


MCQ 1308: If biorhythms are of about 365 days, these are called

        A. circadian rhythm
        B. circannual rhythm
        C. diurnal rhythm
        D. periodic rhythm


MCQ 1309: The process of reabsorption of useful constituents is done in

        A. distal tubules
        B. loop of henel
        C. proximal tubules
        D. bowman's capsule


MCQ 1310: The argument about the enzyme, that they induce a change in its structure when a substrate combines with enzyme was highlighted in

        A. Lock and Key model
        B. Induce Fit model
        C. Conceptual model
        D. all of above


MCQ 1311: Margulies and Schwartz have introduced a new strategy of classification to accommodate all the protists by listing how many phyla?

        A. 27
        B. 20
        C. 15
        D. 30


MCQ 1312: The specialized salt excreting organs are

        A. mammary glands
        B. secretory glands
        C. anorectal glands
        D. rectal glands


MCQ 1313: Inhibitors blocking the active site by making covalent bonds are specifically known as

        A. reversible inhibitors
        B. irreversible inhibitor
        C. competitive inhibitors
        D. non-competitive inhibitors


MCQ 1314: The endocrine system consists of how many glands?

        A. 10
        B. 15
        C. 20
        D. 25


MCQ 1315: Chemical substances which act as an inhibitor for the growth of microorganisms are called

        A. antibodies
        B. antiseptics
        C. antibiotics
        D. anti inflammatory


MCQ 1316: After fertilization of ovary, the fruit is made which contain

        A. ovum
        B. embryo
        C. seeds
        D. cotyledon


MCQ 1317: The type of respiration which humans adopt in severe physical activities is

        A. aerobic
        B. anaerobic
        C. fermentation
        D. accumulation


MCQ 1318: Hypothesis always requires a tentative explanation of

        A. reasoning
        B. perception
        C. observation
        D. result


MCQ 1319: Gibberellins sometimes substitute for

        A. blue light
        B. red light
        C. green light
        D. yellow light


MCQ 1320: Algae which serves as a "complete whole food" and contain all essential amino acids in perfect balance, is known as super

        A. storing algae
        B. blue algae
        C. green algae
        D. blue green algae


MCQ 1321: Genetic variations are produced in

        A. asexual reproduction
        B. sporulation
        C. meiosis
        D. cloning


MCQ 1322: Two species of Acetabularia have been identified based on

        A. structure of the cap only
        B. shape of the cap only
        C. color of the cap
        D. structure and shape of the cap


MCQ 1323: From the rhizoid of Acetabularia, a stalk arises having a

        A. triangular cap
        B. umbrella shaped cap
        C. oval cap
        D. no cap


MCQ 1324: When a nerve impulse is generated in a neuron, its resting membrane potential is replaced by

        A. passive membrane potential
        B. powerful membrane potential
        C. active membrane potential
        D. intelligent membrane potential


MCQ 1325: Viruses are extremely small infectious agents which range in size from 250nm to

        A. 10nm
        B. 12nm
        C. 50nm
        D. 20nm


MCQ 1326: It is believed that hyponasty is due to

        A. auxin
        B. gibberellins
        C. albumin
        D. globulin


MCQ 1327: The light-independent reactions are termed as

        A. light reactions
        B. dark reactions
        C. gaseous reactions
        D. dull reactions


MCQ 1328: The major role in movements in plants is of

        A. auxin indole acetic acid
        B. acetic acid
        C. indole acid
        D. auxin acetic


MCQ 1329: The nephrons which are arranged along the border of medulla looping deep in the inner medulla are called

        A. cortical nephrons
        B. medullar nephrons
        C. juxtamedullary nephrons
        D. pyramidal nephrons


MCQ 1330: A dry, indehiscent fruit in which pericarp is completely fused with seed coat is called

        A. pulses
        B. grams
        C. rice
        D. sugar


MCQ 1331: Leaf primordial is the cells committed to become

        A. leaves
        B. shoot
        C. root
        D. all of above


MCQ 1332: The remodeled area of bone responds to the same set of mechanical

        A. movements
        B. stimuli
        C. receptors
        D. effectors


MCQ 1333: A fossil was found in Texas which was an early reptile, is

        A. cotylasaurs
        B. mammal like reptile
        C. varanope
        D. all of above


MCQ 1334: A transient diploid zygote is formed as a result of a reproduction called

        A. sexual
        B. asexual
        C. conjugation
        D. semi sexual


MCQ 1335: Proteins are formed when carbon combines with nitrogen in amino acid linkages with the help of

        A. covalent bond
        B. ionic bond
        C. peptide bond
        D. glycoside linkage


MCQ 1336: Nutrition which is achieved on the feeding of dead organic matter and decaying bodies is called

        A. symbiotic
        B. autotrophic
        C. saprophytic
        D. Parasitic


MCQ 1337: Tuberculosis is a disease which is

        A. harmless
        B. contagious
        C. venereal
        D. fatal


MCQ 1338: Individuals of different species (animals and plants) that live together in the same habitat constitute a

        A. population
        B. Community
        C. groups
        D. individuals


MCQ 1339: The reciprocal relationship between growth and development is known as

        A. growth correlation
        B. growth co-ordination
        C. development pattern
        D. growth co-operation


MCQ 1340: Pasteurization helps in preserving

        A. fruits
        B. vegetables
        C. meat
        D. milk


MCQ 1341: The bean-shaped cells in a leaf which encloses stoma are

        A. pith
        B. xylem
        C. pores
        D. guard cells


MCQ 1342: Light is the form of energy called

        A. electromagnetic energy only
        B. radiations only
        C. longitudinal-wave patterned energy
        D. electromagnetic energy and radiations


MCQ 1343: The lethal disease which spreads via free sexually contact, blood infusions from an infected person and contaminated syringes is

        A. Hepatitis
        B. Hay fever
        C. Epilepsy
        D. AIDS


MCQ 1344: Enzyme erepsin gives off amino acids with the help of substrate

        A. fats
        B. maltose
        C. polypeptides
        D. dipeptides


MCQ 1345: The passive movements of the chloroplast is an example of a positive tactic movement due to

        A. oxygen fixation
        B. CO2 fixation
        C. cyclosis
        D. nitrogen fixation


MCQ 1346: Early vascular plants lacked true leaves and

        A. roots
        B. shoots
        C. fruits
        D. stem


MCQ 1347: Any cell or individual of any offspring produced by asexually is termed as a

        A. gene
        B. offspring
        C. tissue
        D. clone


MCQ 1348: The rhizoids fix the prothallus to the soil to absorb

        A. heat
        B. water
        C. salts
        D. nutrients


MCQ 1349: Bacteria which are fully dependent on their host for its nutrition are

        A. parasites
        B. chemosynthetic
        C. photosynthetic
        D. none of others


MCQ 1350: Under-activity of parathormone causes a drop in blood calcium ions which in turn leads to

        A. stiffness of body
        B. arthritis
        C. muscle rupture
        D. muscular tetany


MCQ 1351: The systemic arch disappears in

        A. birds only
        B. mammals only
        C. amphibians
        D. birds and mammals


MCQ 1352: In a resting neuron, K+ ions are

        A. 20 times more inside
        B. 20 times more outside
        C. 10 times more inside
        D. 10 times more outside


MCQ 1353: Modification of behavior through a diminution of response to repeated stimuli is

        A. imprinting
        B. instinct
        C. habituation
        D. insight


MCQ 1354: Another name for vasopressin is

        A. oxytocin
        B. oestrogen
        C. anti- diuretic hormone
        D. cortisone


MCQ 1355: The cells at the periphery of blastoderm are

        A. flattened only
        B. larger only
        C. smaller
        D. flattened and larger


MCQ 1356: Antibodies are manufactured by

        A. antigens
        B. B-lymphocyte
        C. T-lymphocytes
        D. A-lymphocytes


MCQ 1357: The duration of chilling treatment in vernalization varies from

        A. four days to four weeks
        B. four days to ten days
        C. four days to three months
        D. one month to three months


MCQ 1358: Active or action potential of neuron lasts for a

        A. minute
        B. second
        C. some milliseconds
        D. nano second


MCQ 1359: The most known disaccharide is sucrose which is a

        A. table sugar
        B. cane sugar
        C. glucose
        D. milk sugar


MCQ 1360: A spore germinates at a suitable temperature after falling on moist soil and produces a

        A. gamete
        B. pith
        C. thallus
        D. prothallus


MCQ 1361: The cells responsible for the increase in the number of cells at the tips of roots and stem are

        A. intercalary meristem
        B. lateral meristem
        C. apical meristems
        D. apex


MCQ 1362: The respiratory system of hemichordates is composed of

        A. gills
        B. blood vessels
        C. gill-slits
        D. lymphatic vessels


MCQ 1363: Mesentries are prominent in the enteron of the body of the

        A. actinia
        B. sea anemone
        C. jelly fish
        D. obelia


MCQ 1364: The muscles which control the urine inside and help in urination while passing it out are

        A. glands
        B. sphincters muscles
        C. abdominal muscles
        D. thigh muscles


MCQ 1365: The internal ciliated opening which is immersed in a coelomic fluid is called

        A. nephridiophore
        B. nephridiostome
        C. cnidarians
        D. flame cells


MCQ 1366: The size of the skull is reduced due to genetic disorder is

        A. Microcephaly
        B. Arthritis
        C. Cleft palate
        D. Osteoarthritis


MCQ 1367: Flowering in pineapple is induced by

        A. cytokinins
        B. ethane
        C. gibberellin
        D. auxins


MCQ 1368: The growth of roots towards water is positive hydrotropism if it grows towards

        A. soil
        B. water
        C. nutrients
        D. sun


MCQ 1369: The total gestation period in humans is about

        A. 50 days
        B. 180 days
        C. 100 days
        D. 280 days


MCQ 1370: The Irish people completely depend on their nutrition on

        A. potatoes
        B. onions
        C. cabbage
        D. carrots


MCQ 1371: The type of hepatitis which is transferred by the contact with faces of the patient is

        A. hepatitis A
        B. hepatitis B
        C. hepatitis C
        D. hepatitis E


MCQ 1372: In the diaphragm on the left side of the abdominal cavity, is

        A. lungs
        B. stomach
        C. esophagus
        D. pancreas


MCQ 1373: The fusion of nuclei in fungi is

        A. karyogamy
        B. progamy
        C. microgamy
        D. all of above


MCQ 1374: The female gametophyte develops into an egg after germination with healthy megaspore and produce

        A. embryo
        B. ova
        C. seed
        D. fruit


MCQ 1375: Alzheimer's disease was first described by Alois Alzheimer in

        A. 1910
        B. 1907
        C. 1906
        D. 1908


MCQ 1376: Immediately after fertilization, the egg undergoes a series of divisions called

        A. mitotic divisions
        B. meiotic divisions
        C. cleavage
        D. segregation


MCQ 1377: The asexual reproduction in the sponge is done by the process of

        A. budding
        B. conjugation
        C. binary fission
        D. multiple fission


MCQ 1378: Pouched mammals are called

        A. prototheria
        B. eutheria
        C. metatheria
        D. lactotheria


MCQ 1379: Lysosomes are cytoplasmic organelles which are specialized in their

        A. histology
        B. morphology
        C. cytology
        D. Chemical biology


MCQ 1380: The kingdom protist has four major groups of eukaryotic organisms, i.e. protozoa, algae, slime molds and

        A. speromogonia
        B. dimycotes
        C. oomycotes
        D. slime


MCQ 1381: Motile male gamete or sperm is also known as

        A. ova
        B. antherozoids
        C. zygote
        D. archegonia


MCQ 1382: Hexose is also known as

        A. ribose sugar
        B. aldo sugar
        C. table sugar
        D. cane sugar


MCQ 1383: The trial and error learning is called

        A. conditioned reflex type 1
        B. conditioned reflex type 2
        C. latent learning
        D. insight learning


MCQ 1384: To remove the need of picking fruit from tree crops which one is sprayed?

        A. ethane
        B. cytokinin
        C. abscisic acid
        D. gibberellin


MCQ 1385: Sebaceous glands protect skin against microorganism by secreting

        A. sebum
        B. sweat
        C. salts
        D. water


MCQ 1386: Both the brain and spinal cord are wrapped by how many layers of membrane?

        A. single
        B. double
        C. triple
        D. four


MCQ 1387: Bones and cartilages are composed of protein known as

        A. lipoprotein
        B. globulin
        C. collagen
        D. albumin


MCQ 1388: The adrenal cortex secretes

        A. aldosterone
        B. thyroxine
        C. testosterone
        D. oestrogen


MCQ 1389: The menstrual cycle can be divided into

        A. two phases
        B. three phases
        C. four phases
        D. five phases


MCQ 1390: There are two types of muscles in annelids based on the arrangement of

        A. flame cells
        B. nephridia
        C. muscles
        D. chitin


MCQ 1391: The components of the internal environment are

        A. water
        B. solutes
        C. temperature
        D. all of above


MCQ 1392: The total number of vertebrae in a vertebral column is

        A. 33
        B. 23
        C. 32
        D. 30


MCQ 1393: External pinnae of ear and epiglottis are formed by

        A. hyaline cartilage
        B. fibro cartilage
        C. contractile muscles
        D. all of above


MCQ 1394: The nucleus contains a network of subdivisions called

        A. microfilaments
        B. microtubules
        C. chromatin fibers
        D. chromatin network


MCQ 1395: The glands which help in digestion of food in humans are

        A. salivary glands
        B. liver
        C. pancreas
        D. all of above


MCQ 1396: Organisms respond to the stimuli which are

        A. external only
        B. internal only
        C. central
        D. external and internal


MCQ 1397: Overextension of the heart is prevented by

        A. pericardium
        B. peritoneal
        C. atria
        D. ventricles


MCQ 1398: Increase in higher mental activities of learning and memory is a result of an increase in the size of

        A. hypothalamus
        B. thalamus
        C. pons
        D. cerebral hemispheres


MCQ 1399: In artificial incubators, the temperature is usually regulated between

        A. 20-30 °C
        B. 36-38 °C
        C. 40-45 °C
        D. 45-50 °C


MCQ 1400: Nissl's granules are associated with

        A. smooth endoplasmic reticulum and golgi bodies
        B. lysosomes and golgi bodies
        C. mitochondria and golgi bodies
        D. rough endoplasmic reticulum and golgi apparatus


MCQ 1401: Each testis consists of a highly complex duct system called

        A. follicle cells
        B. glomerulus
        C. seminiferous tubules
        D. interstitial cells


MCQ 1402: Cold receptors are more abundant than heat receptors

        A. 15 times
        B. 10 Times
        C. 5 times
        D. 20 times


MCQ 1403: Cortisol antagonizes the action of

        A. amylase
        B. gastrin
        C. insulin
        D. secretin


MCQ 1404: Organs which carry out actions or produce responses are

        A. receptors
        B. action organs
        C. effectors
        D. synapse


MCQ 1405: External Fertilization occurs in which?

        A. terrestrial environment
        B. air
        C. aquatic environment
        D. mixed environment


MCQ 1406: In transport, Capillaries bear no

        A. pulse
        B. valve
        C. elastic fibers
        D. all of above


MCQ 1407: A disease which inflames the liver of human beings is

        A. hepatitis
        B. measles
        C. influenza
        D. AIDS


MCQ 1408: Secretions produced by ribosome are passed via endoplasmic reticulum and

        A. Golgi complex
        B. mitochondria
        C. nucleus
        D. vacuole


MCQ 1409: High levels of cholesterol in the blood can lead to the production of

        A. thrombus
        B. atheroma
        C. lipoproteins
        D. proteins


MCQ 1410: Ball and socket joint is formed by the bone

        A. humerus
        B. ulna
        C. radius
        D. phalanges


MCQ 1411: The pitcher of Sarracenia is filled with

        A. chemicals
        B. proteins
        C. water
        D. soil


MCQ 1412: Each type of Principal sensation pain, touch, sight, sound are called

        A. modalities of sensation
        B. modalities of reception
        C. modalities of concentration
        D. modalities of detection


MCQ 1413: The process of development of a haploid offspring from a haploid egg is called

        A. haploid parthenogenesis
        B. diploid parthenogenesis
        C. single parthenogenesis
        D. double parthenogenesis


MCQ 1414: Oxytocin is secreted by pituitary gland's

        A. anterior lobe
        B. median lobe
        C. posterior lobe
        D. frontal lobe


MCQ 1415: The serum which is produced by antitoxins in case of a snake bite venom is called

        A. anti-sera
        B. anti-venom
        C. anti-venom serum
        D. anti-serum venom


MCQ 1416: Indole-3-acetic acid (IAA) causes

        A. cell divisions
        B. cell differentiation
        C. cell elongation
        D. cell maturation


MCQ 1417: Malaria in humans is caused by the apicomplexan called

        A. glycogen
        B. plasmodium
        C. anopheles
        D. mosquito


MCQ 1418: All enzymes control the metabolism of the cell because they are

        A. carbohydrates
        B. acids
        C. proteins
        D. fats


MCQ 1419: The initial stage of birth is the result of the stimuli from the

        A. fetal pituitary
        B. mother's pituitary
        C. decrease in level of progesterone
        D. all of above


MCQ 1420: The function of roots is to

        A. reproduce
        B. support
        C. store food
        D. anchor the plant


MCQ 1421: The location of furrow during a cell division is done by

        A. mitochondria
        B. golgi complex
        C. centrioles
        D. ribosome


MCQ 1422: Behavior activities occurring at regular intervals are called

        A. synchronized rhythms
        B. repeated actions
        C. biorhythms
        D. periodic rhythms


MCQ 1423: Earthworm posses another type of tubular excretory system called as

        A. protonephridium
        B. metanephridium
        C. malpighian tubules
        D. all of above


MCQ 1424: If viral DNA is detached from the host's chromosome, it leads to the beginning of the lytic cycle called

        A. invasion
        B. development
        C. induction
        D. convection


MCQ 1425: Higher animals possess a higher level of

        A. instincts
        B. learning
        C. kinesis
        D. habituation


MCQ 1426: If the concentration of an enzyme is increased by two-fold, the rate of reaction would be

        A. half
        B. double
        C. triple
        D. ceased


MCQ 1427: For every two K+ ions that are actively transported inward into the neuron,

        A. three Na+ are pumped out
        B. one Na+ is pumped out
        C. two Na+ are pumped out
        D. four Na+ are pumped out


MCQ 1428: In kingdom Animalia, Setae are the organs of

        A. locomotion
        B. excretion
        C. respiration
        D. digestion


MCQ 1429: Oviducts and ovaries are both functional in

        A. eagle
        B. crow
        C. reptiles
        D. raven


MCQ 1430: The lower two pairs of ribs are not attached to the sternum and called as

        A. rising ribs
        B. floating ribs
        C. hovering ribs
        D. hanging ribs


MCQ 1431: The complex interwoven filaments which delicate and feathery constitutes a multicellular body of a

        A. brown algae
        B. green algae
        C. red algae
        D. cyan algae


MCQ 1432: At a point during the estrous cycle, estrogen exerts positive feedback which results in increased production of

        A. prolactin
        B. progesterone
        C. Luteinizing Hormone (LH)
        D. Follicle-Stimulating Hormone (FSH)


MCQ 1433: The row of phalanges are attached to metacarpals which support

        A. wrist
        B. fingers
        C. knee
        D. elbow


MCQ 1434: Dilation of blood vessels in skeletal muscles is caused by

        A. oxytocin
        B. adrenaline
        C. oestrogen
        D. noradrenaline


MCQ 1435: The in folds of the membranes of the mitochondrion is called

        A. cisternae
        B. cristae
        C. chromatin fibers
        D. chromatic networks


MCQ 1436: There is gelatinous layer mesenchyme which is present between pinacoderm and

        A. choanoderm
        B. epiderm
        C. mesoderm
        D. endoderm


MCQ 1437: Under the central cells of the blastoderm, a pool of fluid develops giving the area a translucent appearance called

        A. area opaca
        B. area pellucida
        C. area translucent
        D. all of above


MCQ 1438: Somites are seen in the embryo of about

        A. 12-14 hours
        B. 15-16 hours
        C. 25-26 hours
        D. 20-23 hours


MCQ 1439: The male and female sex organs appear on the same prothallus in the region of under surface, this property is

        A. monoecious
        B. diecious
        C. triecious
        D. quadecious


MCQ 1440: The endometrium is made receptive for the implantation of a zygote by

        A. estrogen
        B. progesterone
        C. testosterone
        D. oxytocin


MCQ 1441: In an average human being, heart contracts estimated

        A. 3.2 billion times
        B. 2.2 billion times
        C. 2.5 billion times
        D. 5.2 billion times


MCQ 1442: Gymno sperms cannot produce

        A. seeds
        B. fruits
        C. leaves
        D. roots


MCQ 1443: In herbivores animals, there is no

        A. molar
        B. premolars
        C. incisors
        D. canines


MCQ 1444: The name of nucleic acids reflected the feature that they are isolated from their

        A. chromosomes
        B. nuclei
        C. Golgi complex
        D. mitochondria


MCQ 1445: The digestive system of cockroach comprises of

        A. fore gut
        B. mid gut
        C. hind gut
        D. all of above


MCQ 1446: Lipase hydrolyzes fats into which?

        A. fatty acid only
        B. glycerol only
        C. glycogen
        D. fatty acids and glycerol


MCQ 1447: The elements which occur in a living organism are called

        A. bio elements
        B. chemical elements
        C. super elements
        D. natural elements


MCQ 1448: Nerve impulse can be defined as a wave of

        A. chemical changes
        B. electrical changes
        C. electrochemical changes
        D. all of above


MCQ 1449: The areas which act as storage and are active metabolism sites include

        A. bark
        B. roots
        C. sink
        D. sieve


MCQ 1450: The function of neuroglia is to provide

        A. nutrition to neurons only
        B. protection to neuron only
        C. nerve impulse to neurons
        D. nutrition and protection to neuron


MCQ 1451: In honey bees, male or drones develop from

        A. fertilized egg
        B. sperm
        C. unfertilized egg
        D. embryo


MCQ 1452: Rounded closely packed mass of blastomeres is called

        A. gastrula
        B. morula
        C. neurula
        D. hypoblast


MCQ 1453: Response in the form of contraction is shown by

        A. bones
        B. glands
        C. tissues
        D. muscles


MCQ 1454: The muscles fibers have an iron-containing protein called

        A. hemoglobin
        B. myoglobin
        C. globulin
        D. cytoglobin


MCQ 1455: Hydra is aquatic and diploblastic

        A. bryophyte
        B. cnidarians
        C. actinipods
        D. amphibians


MCQ 1456: The name Platyhelminthes means

        A. worms
        B. tape worms
        C. flat worms
        D. snakes


MCQ 1457: Energy transformation in living systems is attained with the help of

        A. photosynthesis
        B. respiration
        C. Krebs cycle
        D. translocation


MCQ 1458: At each end of the neural tube, small openings are present and called

        A. neuro-pores
        B. neuro openings
        C. neurosomes
        D. neuralgates


MCQ 1459: The heterogeneous group of compounds which are linked with fatty acids is called

        A. lipids
        B. proteins
        C. glycerol
        D. carbohydrates


MCQ 1460: The displacement of a set point in the hypothalamus is due to

        A. pathogens
        B. pyrogens
        C. receptors
        D. effectors


MCQ 1461: The hypoblast is mainly presumptive

        A. ectoderm
        B. mesoderm
        C. endoderm
        D. exoderm


MCQ 1462: The number of people over age 80 is

        A. 2 million
        B. 3 million
        C. 4 million
        D. 5 million


MCQ 1463: Cucumber, tomato and garden pea are

        A. short day plants
        B. long day plants
        C. day neutral plants
        D. all of above


MCQ 1464: No blood cells ever leak from capillaries through intercellular spaces except some of the

        A. red blood cells
        B. white blood cells
        C. platelets
        D. nutrients


MCQ 1465: All the information about the function of a cell and its genetic structure is stored in

        A. tissue
        B. cell wall
        C. cytosol
        D. DNA


MCQ 1466: Diploid parthenogenesis occurs in

        A. hydra
        B. aphid
        C. honey bee
        D. mosquito


MCQ 1467: The pairing of an irrelevant stimulus with a natural primary stimulus that elicits an automatic response is

        A. habituation
        B. imprinting
        C. conditioning
        D. learning


MCQ 1468: Powdery mildews, potato wilt, apple scab are all diseases caused by

        A. jelly fish
        B. algae
        C. fungi
        D. hydra


MCQ 1469: Transitions between sleep and wakefulness are influenced by certain neurons in

        A. medulla
        B. hippocampus
        C. thalamus
        D. pons


MCQ 1470: The function of the oxytocin hormone is to induce

        A. secretion of sweat
        B. labor pain
        C. pupil dilation
        D. high blood pressure


MCQ 1471: The daily changes in the turgor pressure facilitate the sleeping movements in the

        A. pulvinus
        B. vascular tissues
        C. cortex
        D. cambium


MCQ 1472: The two strands of DNA is a double helix structure, coiled with each other as

        A. parallel
        B. anti parallel
        C. opposite
        D. connected


MCQ 1473: The main two components of blood of human being

        A. plasma and cells
        B. plasma and bones
        C. lungs and cells
        D. heart and blood vessels


MCQ 1474: Tremor of hands and head occurs in

        A. alzheimer's disease
        B. parkinson's disease
        C. arthritis
        D. microcephaly


MCQ 1475: The shedding of the exoskeleton is called

        A. molding only
        B. ecdysic only
        C. folding
        D. molding and ecdysic


MCQ 1476: The movement of water molecules from an area of higher concentration to an area of lower concentration through a semi-permeable membrane is the process of

        A. diffusion
        B. osmosis
        C. reverse osmosis
        D. active transport


MCQ 1477: The arrangements of vascular bundles are effective in

        A. wind stress
        B. weight bearing ability
        C. pressure
        D. heat


MCQ 1478: The splitting of water molecule releasing oxygen is called

        A. photosynthesis
        B. photolysis
        C. photolytic
        D. photophosphorylation


MCQ 1479: Fishes keep themselves balance in water while swimming by its

        A. scales
        B. gills
        C. bladder
        D. fins


MCQ 1480: The type of RNA which acts as a machinery for the synthesis of proteins is

        A. mRNA
        B. tRNA
        C. rRNA
        D. RNA


MCQ 1481: Bacteria which can grow with or without the presence of oxygen is known as

        A. facultative bacteria
        B. photosynthetic bacteria
        C. chemosynthetic bacteria
        D. uniroebic bacteria


MCQ 1482: The animals which possess flame cells, excretory ducts and excretory pores are termed as

        A. acoelomates
        B. coelomates
        C. actomates
        D. feuromates


MCQ 1483: At the cephalic end of the primitive streak, closely packed cells form a local thickening known as

        A. nodes of ranvier
        B. Spemann's node
        C. albert's node
        D. Hansen's node


MCQ 1484: Mammals maintain a constant temperature range, which is about

        A. 37-38 °C
        B. 36-38 °C
        C. 37-38 °C
        D. 37-39 °C


MCQ 1485: The circulatory system in phylum Arthropoda and phylum Mollusca is

        A. open circulatory system
        B. close circulatory system
        C. partially open system
        D. partially closed system


MCQ 1486: The nephrons are arranged in a distinct region of

        A. cortex
        B. medulla
        C. calyx
        D. pelvis


MCQ 1487: A snail crawling on a sheet of glass ultimately stops responding to tapping which is known as

        A. conditioning
        B. habituation
        C. instinct
        D. learning behavior


MCQ 1488: The organisms which lack mitosis division and use binary fission method for cell division are known as

        A. prokaryotes
        B. eukaryotes
        C. yeast
        D. fungi


MCQ 1489: During elongation, the cell volume increases due to uptake of

        A. minerals
        B. salts
        C. water
        D. oxygen


MCQ 1490: Sponge bone comprises of cells

        A. osteoblast
        B. osteocyte
        C. osteoclast
        D. all of above


MCQ 1491: Grapes, figs, and dates are rich in

        A. fructose
        B. starch
        C. glucose
        D. proteins


MCQ 1492: The procedures which help to eliminate or reduce the possibility of infection is called

        A. antisepsis
        B. antiseptics
        C. antibodies
        D. anti inflammatory


MCQ 1493: In the rainy season, the part of the plant act as photosynthetic organ and stores water is

        A. root
        B. stem
        C. flower
        D. seed


MCQ 1494: The bones are hard due to the presence of

        A. calcium
        B. vitamin D
        C. calcium phosphate
        D. magnesium


MCQ 1495: Economically the most important family which benefit both human and animal is

        A. Poaceae
        B. Solanaceae
        C. Acacia
        D. Rosaceae


MCQ 1496: Just beneath the cell membrane, there are extremely thin hair-like appendages called as

        A. flame cell
        B. pili
        C. villi
        D. flagella


MCQ 1497: The vas deferens becomes highly convoluted to form

        A. epididymis
        B. prepuce
        C. sperm duct
        D. symphysis pubis


MCQ 1498: Micrographic is the most famous work on the discovery of cell which is given by

        A. Robert Hooke
        B. Lorenz Oaken
        C. Theodor Schwann
        D. F. Miescher


MCQ 1499: The corpus luteum secretes the hormone

        A. estrogen
        B. progesterone
        C. testosterone
        D. oxytocin


MCQ 1500: The cleaning of blood is termed as

        A. peritoneal dialysis
        B. hemodialysis
        C. ectodialysis
        D. hypo dialysis


MCQ 1501: The multicellular animals are distinguished from unicellular by name

        A. parazoa
        B. metazoa
        C. protozoa
        D. Cordata


MCQ 1502: Preparation and maintenance of the body for the state of pregnancy is done by

        A. oestrogen
        B. progesterone
        C. oxytocin
        D. luteinizing hormone


MCQ 1503: The behavior which enables pill bugs to reach the moist area which is required for their life is termed as

        A. reflex
        B. instinct
        C. imprinting
        D. kinesis


MCQ 1504: Effectors which respond by secreting various hormones are

        A. glands
        B. muscles
        C. cartilage
        D. bones


MCQ 1505: The system of adjacent cell walls present throughout the plant roots is

        A. cellular system
        B. apoplast pathway
        C. symplast pathway
        D. vacuolar pathway


MCQ 1506: The number of bacteria and its kinds vary concerning the changes in locality and

        A. size
        B. environment
        C. shape
        D. material


MCQ 1507: The pests are destroyed by using a living organism is attributed to the process of

        A. biological control
        B. hazards control
        C. disease control
        D. chemical control


MCQ 1508: Birds have developed a thick muscular organ which helps in crushing of food called

        A. jaws
        B. beak
        C. tongue
        D. gizzard


MCQ 1509: An autotrophic, small, heart-shaped and flat structure is called

        A. sporophyll
        B. thallus
        C. prothallus
        D. gamete


MCQ 1510: The study of growth and differentiation have undergone by an animal from a zygote into a highly complex individual is called

        A. histology
        B. zoology
        C. embryology
        D. physiology


MCQ 1511: The olfactory bulbs in telencephalon are concerned with a sense of

        A. taste
        B. smell
        C. touch
        D. hearing


MCQ 1512: A cofactor and a polypeptide chain co-exist in an activated enzyme called as

        A. cofactor
        B. holoenzyme
        C. apoenzyme
        D. catalyst


MCQ 1513: In nature, p660 to p730 conversion takes place in

        A. red light
        B. white light
        C. day light
        D. dim light


MCQ 1514: In a coordination system, Sensory nerve contains

        A. motor fibers
        B. mixed fibers
        C. relay fibers
        D. sensory fibers


MCQ 1515: The exchange of gases between organism and environment is termed as

        A. internal respiration
        B. external respiration
        C. respiration
        D. acquired respiration


MCQ 1516: The normal pH of the blood of a human being is

        A. 6.4
        B. 14.2
        C. 3.4
        D. 7.4


MCQ 1517: Photosynthetic prokaryotes have special photosynthetic membranes which work like

        A. lumen
        B. stamen
        C. thylakoids
        D. stroma


MCQ 1518: Hans Driesch in his experiment took egg of

        A. salamander
        B. sear urchin
        C. earthworm
        D. turtle


MCQ 1519: Uterine contractions during childbirth are strongest from

        A. bottom to top
        B. top to bottom
        C. side ways
        D. center to top


MCQ 1520: In Pakistan, the soil is replenished by

        A. urea
        B. super phosphates
        C. ammonium nitrate
        D. ammonium sulfate


MCQ 1521: Premature birth or miscarriage is caused by disturbances in the secretion of

        A. progesterone
        B. oxytocin
        C. estrogen
        D. testosterone


MCQ 1522: Which are the characteristics of the differentiation phase?

        A. thickening appears on the walls of xylem vessels
        B. new structural features develop
        C. walls of some cells become pitted
        D. all of above


MCQ 1523: Robert Koch formulated the germ theory of disease and discovered that specific bacteria which caused Tuberculosis and

        A. epilepsy
        B. Cholera
        C. pneumonia
        D. cancer


MCQ 1524: In the walls of seminiferous tubules, the cells that secrete seminal fluid are called

        A. leydig cells
        B. sertoli cells
        C. germ cells
        D. epithelium cells


MCQ 1525: The animal starch is called

        A. glucose
        B. glycogen
        C. cellulose
        D. fructose


MCQ 1526: Pain receptors are more abundant than cold receptors

        A. 30 times
        B. 25 times
        C. 28 times
        D. 27 Times


MCQ 1527: Chemotropism response is seen in

        A. hyphal
        B. fungi
        C. virus
        D. bacteria


MCQ 1528: Bacteria can range in size from 0.1µm to

        A. 600µm
        B. 400µm
        C. 300µm
        D. 100µm


MCQ 1529: The tuft of cilia propels interstitial fluid into

        A. tentacles
        B. septum
        C. nucleus
        D. tubular system


MCQ 1530: The chloroplast is present inside the leaf within tissue called

        A. palisade mesophyll
        B. microphyll
        C. epidermis
        D. spongy mesophyll


MCQ 1531: For complete removal of tapeworms which medicine is used?

        A. antifungal
        B. antibiotic
        C. praziquantel
        D. anti allergic


MCQ 1532: The rasping tongue-like structure present on the body of mollusks is

        A. mantle
        B. setae
        C. radula
        D. slug


MCQ 1533: Animals and plants have distributed themselves in a wide range of habitats due to

        A. osmoregulation
        B. thermoregulation
        C. glucoregulation
        D. none of others


MCQ 1534: Rodents and Ungulates belong to which?

        A. herbivores
        B. carnivores
        C. detritivores
        D. omnivores


MCQ 1535: The function of tRNA and mRNA is to decode the information from genes into a specific

        A. lipid
        B. proteins
        C. sugar
        D. carbohydrates


MCQ 1536: The endoskeleton is made up of

        A. bones only
        B. cartilage only
        C. muscles
        D. bones and cartilage


MCQ 1537: Virology deals with the study of

        A. bacteria
        B. virus
        C. amoeba
        D. euglena


MCQ 1538: Germ cells in the ovary first produce

        A. oogonia
        B. primary oocytes
        C. secondary oocyte
        D. polar body


MCQ 1539: The positive hydrostatic pressure which is generated by roots is around

        A. 200-300 KPA
        B. 100-220 KPa
        C. 100-200 KPa
        D. 110-330 KPa


MCQ 1540: Leguminous plants have specialized nodules which contain nitrogen-fixing

        A. virus
        B. bacteria
        C. fungi
        D. algae


MCQ 1541: All are wrong about Strawberry, but that it?s a

        A. long day plant
        B. neutral plant
        C. short day plant
        D. day neutral plant


MCQ 1542: Larynx and epiglottis is well developed and present in

        A. reptiles
        B. mammals
        C. birds
        D. amphibians


MCQ 1543: The number of amino acids that are found in occurring cells and tissues is

        A. 140
        B. 170
        C. 120
        D. 160


MCQ 1544: Glycogen cannot be mixed in the aqueous solution therefore it is

        A. insoluble
        B. soluble
        C. hydrolyzed
        D. useless


MCQ 1545: Hans Driesch performed his experiment on sea urchin egg in

        A. 1822
        B. 1840
        C. 1849
        D. 1855


MCQ 1546: The adrenal cortex is active all the time but especially during

        A. shock
        B. stress
        C. infection
        D. all of above


MCQ 1547: The structure of a sporophyte consists of a foot, seta and

        A. vacuole
        B. cell membrane
        C. cell wall
        D. capsule


MCQ 1548: Rickets is the disease which deforms pelvis and bow legs of mostly

        A. children
        B. animals
        C. aged women
        D. aged men


MCQ 1549: In the earthworm excretory system, the epithelium reabsorbs salts from

        A. septum
        B. capillary network
        C. bladder
        D. lumen


MCQ 1550: Oxytocin and antidiuretic hormone after being produced is stored in which lobe of pituitary?

        A. anterior
        B. median
        C. frontal
        D. posterior


MCQ 1551: Timing of any behavior results from a combination of effects of rhythmical internal process and

        A. one's genetic makeup
        B. timed events of the environment
        C. hormonal imbalances
        D. random change in environment


MCQ 1552: There are numerous thread-like filaments which are long, branched and tubular called as

        A. hyphae
        B. mycelium
        C. tubes
        D. branches


MCQ 1553: The stomatal responses are signaled by the guard cells as they can sense

        A. light
        B. heat
        C. humidity
        D. all of above


MCQ 1554: Liver-worts, mosses, ferns move towards archegonia following the stimulus of

        A. heat
        B. nucleic acid
        C. spores
        D. chloroplast


MCQ 1555: In Animalia kingdom, Archaeopteryx was the size of a

        A. dove
        B. crow
        C. parrot
        D. macaw


MCQ 1556: Cell theory proposes that all living cells arise from

        A. fossils
        B. plant cells
        C. pre-existing cells
        D. new cells


MCQ 1557: The cardiac muscles are composed of myofibrils and myofilaments of

        A. actin
        B. myosin
        C. thrylosin
        D. embrosin


MCQ 1558: Germination of seeds in some lettuce varieties is promoted by

        A. blue light
        B. red light
        C. green light
        D. white light


MCQ 1559: The study of aging is called

        A. gerontology
        B. histology
        C. physiology
        D. anthropology


MCQ 1560: The animals which have organized tissue and organ systems are

        A. protozoa
        B. Eumetazoa
        C. parazoa
        D. metazoa


MCQ 1561: In the alternation of generations, a haploid spermatozoid fuses with a haploid egg to produce diploid

        A. gametophyte
        B. rhizoids
        C. oospore
        D. spores


MCQ 1562: Diseases like polio, whooping cough, measles, mumps, etc. can be avoided by

        A. medicine
        B. Vaccination
        C. precautions
        D. natural remedies


MCQ 1563: The specific arrangement of highly complex proteins and polypeptide tertiary chains is found in the oxygen-carrying protein of RBC called

        A. Immunoglobulin
        B. platelets
        C. hemoglobin
        D. keratin fiber


MCQ 1564: RNA is found in the nucleolus of the cell and DNA is found in

        A. chromosomes
        B. cytosol
        C. cell wall
        D. vacuole


MCQ 1565: The killer of bacteria of a sick person is an

        A. antivirus
        B. antifungal
        C. antibody
        D. antibacterial


MCQ 1566: The components of living control system are

        A. receptor
        B. control center
        C. effectors
        D. all of above


MCQ 1567: Salamander zygote was divided by Spemann using minute

        A. horse hair
        B. rat hair
        C. ligature of human hair
        D. cat hair


MCQ 1568: Gene therapy repairs defective genes by isolating normal gene and inserting it into the host's

        A. veins
        B. normal cells
        C. liver
        D. bone marrow


MCQ 1569: Higher chordates have a specialized notochord called

        A. brain
        B. muscles
        C. vertebral column
        D. backbone


MCQ 1570: The bacteria fix nitrogen in soil converts into

        A. nitrates
        B. bicarbonates
        C. carbonates
        D. sulfates


MCQ 1571: The pores which help in the removal of water from the body of sponges are called

        A. ostulus
        B. osculum
        C. ostia
        D. spongecoel


MCQ 1572: Only 20 types of amino acids can give rise to over

        A. 10,000 proteins
        B. 10,500 proteins
        C. 10,100 proteins
        D. 11,500 proteins


MCQ 1573: The animals from Grade Bilateria have well defined

        A. dorsal surfaces only
        B. ventral surfaces only
        C. epidermis
        D. dorsal and ventral surfaces


MCQ 1574: The protein factories of bacteria are

        A. mesosome
        B. ribosomes
        C. spores
        D. plasmids


MCQ 1575: The phage in which lysis of host cell takes place is

        A. prophage
        B. lytic phage
        C. virulent phage
        D. metaphage


MCQ 1576: Excessive protein breakdown resulting in muscular and bone weakness is a symptom of

        A. Addison's disease
        B. Cushing's disease
        C. parkinson's disease
        D. alzheimer's disease


MCQ 1577: The liver oil which is used in medicine as a source of multivitamin (A and D) is obtained from

        A. shark
        B. ray
        C. eel
        D. dolphin


MCQ 1578: Embolus dislodge from its site of production and moves in the

        A. nervous
        B. gustatory
        C. circulatory
        D. digestive


MCQ 1579: If the herbaceous stem loses its turgidity, it may

        A. die
        B. regrow
        C. regenerate
        D. wilt


MCQ 1580: Around 15-20 million years is the time, for the evolution of a

        A. stem
        B. leaf
        C. root
        D. flower


MCQ 1581: There are extensive stomata on the upper surface of leaves in

        A. geophytes
        B. bryophytes
        C. hydrophytes
        D. xerophytes


MCQ 1582: The sporophyte is dominant and the gametophyte is small and reduced but separate as well as independent. This development shows heteromorphic alternation of generation

        A. heteromorphic alternation of generation
        B. automorphic alternation of generation
        C. heteromorphic alternation
        D. hypomorphic alternation of generation


MCQ 1583: The mammals which can stay under the ocean for more than two hours without coming up for air are

        A. cetaceans
        B. sea urchin
        C. sea anemones
        D. oceanic


MCQ 1584: During the travel of nerve impulse, across the cell membrane

        A. lysosomes move
        B. molecules move
        C. ions move
        D. atoms move


MCQ 1585: The inhabited part of the earth in which living organisms and non-living components co-exists is called

        A. Ecosystem
        B. Community
        C. Biosphere
        D. population


MCQ 1586: The hormone aldosterone is secreted by the

        A. cortical nephrons
        B. renal cortex
        C. adrenal cortex
        D. medullary cortex


MCQ 1587: All the members of a clone are genetically identical until and unless there occurs a

        A. transfer
        B. fertilization
        C. mutation
        D. change


MCQ 1588: The branch of biology in which we study living organisms, systems or processes in manufacturing and industrial area is called

        A. Environmental Biology
        B. Human Biology
        C. Microbiology
        D. Biotechnology


MCQ 1589: The receptors which show response to cold and warmth are

        A. Thermoreceptors
        B. Chemoreceptors
        C. Nociceptors
        D. Mechanoreceptors


MCQ 1590: The bulb-like cells which are performing excretory functions are

        A. neurospore
        B. flame cells
        C. rhizoids
        D. ganglia


MCQ 1591: Diploid chromosome number is found in normal body cell whereas haploid is found in

        A. germ cells
        B. brain cells
        C. meristematic cells
        D. sensory cells


MCQ 1592: The commercial cork is obtained from the bark of a tree-like

        A. conifers
        B. quercus suber
        C. mango tree
        D. banana tree


MCQ 1593: The requirement of the length of the dark period for cocklebur is

        A. 11-15 h
        B. 12-20 h
        C. 20-22 h
        D. 10-11 h


MCQ 1594: The well developed nervous system of Platyhelminthes composed of a network of

        A. tracts
        B. ducts
        C. veins
        D. ganglia


MCQ 1595: The nucleotide in DNA are united with one another by a linkage called

        A. ester linkage
        B. di ester linkage
        C. phosphodiester linkage
        D. peptide linkage


MCQ 1596: The size of intercellular spaces in the walls of lymph vessels are larger which facilitates the entry of

        A. larger molecules
        B. lymph node
        C. interstitial fluid
        D. proteins


MCQ 1597: Between the mother and the fetus, placenta facilitates the exchange of

        A. oxygen
        B. carbon dioxide
        C. waste and nutrients
        D. all of above


MCQ 1598: An organic substance which hardens the secondary cell wall is usually impregnated with

        A. xylem
        B. phloem
        C. sclereides
        D. lignin


MCQ 1599: The yielded compound by the combination of a base and a pentose sugar is called

        A. nucleotide
        B. nucleoside
        C. Nuclei
        D. nucleolus


MCQ 1600: Zea mays (corn) belongs to the phylum

        A. tracheophyta
        B. monera
        C. protozoa
        D. protista


MCQ 1601: Skull, the vertebrae, ribs, and the sternum together make up

        A. Appendicular skeleton
        B. Axial skeleton
        C. Dorsal skeleton
        D. Ventral skeleton


MCQ 1602: The modified hyphae which help to anchor saprobic fungi are known as

        A. rhizoids
        B. haustoria
        C. hyphae
        D. mycelium


MCQ 1603: Chloroplast contain a green pigment called

        A. leaf
        B. stem
        C. chlorophyll
        D. chromoplast


MCQ 1604: The form of learning best known in chickens, ducks, and geese is

        A. habituation
        B. conditioning
        C. instinct
        D. imprinting


MCQ 1605: The segments in the body of Annelids are separated with the help of

        A. septa
        B. segmental
        C. segmented
        D. webs


MCQ 1606: The aqueous ground soluble part of the cytoplasm is called

        A. cytosol
        B. vacuole
        C. mitochondria
        D. nucleus


MCQ 1607: One liter of the air contains oxygen about

        A. 200 ml
        B. 300 ml
        C. 100 ml
        D. 400 ml


MCQ 1608: The three main types of plastids are chloroplast, chromoplast and

        A. leukocytes
        B. leucoplasts
        C. chlorophyll
        D. magneplasts


MCQ 1609: In higher vertebrates, zygote, after fertilization undergoes cell division by mitosis, called

        A. separation
        B. segregation
        C. cleavage
        D. division


MCQ 1610: In a tobacco leaf, there are 12000 stomata per square

        A. meter
        B. centimeter
        C. millimeter
        D. micrometer


MCQ 1611: Sterilization is done by the use of

        A. x-rays
        B. beta rays
        C. gamma rays
        D. alpha rays


MCQ 1612: The cell volume during elongation increases up to

        A. 10 folds
        B. 100 folds
        C. 150 folds
        D. 200 folds


MCQ 1613: During the elongation phase of growth

        A. cell volume increases
        B. plasticity of cell wall increases
        C. wall pressure is reduced
        D. all of above


MCQ 1614: Degeneration of the elastic tissues in the tunica media of blood vessels cause

        A. arthritis
        B. anemia
        C. arteriosclerosis
        D. sickle cell disease


MCQ 1615: Lipids are insoluble in water but it is easily soluble in

        A. inorganic solvent
        B. water
        C. organic solvent
        D. acids


MCQ 1616: The phage tail structure of a bacteriophage is more complex than its

        A. body
        B. tail
        C. head
        D. tentacles


MCQ 1617: An external factor influencing the growth is

        A. temperature
        B. light
        C. oxygen
        D. all of above


MCQ 1618: The amount of DNA in a germ cell (sperm or ova) is one half to that of

        A. receptive cells
        B. brain cells
        C. somatic cells
        D. meristematic cells


MCQ 1619: The products of digestion are passed on in the whole body of planarian and are done by the process of

        A. osmosis
        B. diffusion
        C. active transport
        D. passive transport


MCQ 1620: The organ of voice in the bird is called a

        A. trachea
        B. syrinx
        C. air sacs
        D. balloon


MCQ 1621: In the reproduction cycle of which one, Ovoviparity occurs?

        A. duckbill platypus
        B. spiny ant eater
        C. garter snake
        D. all of above


MCQ 1622: The soluble plasma protein is

        A. fibrin
        B. fibrinogen
        C. casein
        D. caseinogen


MCQ 1623: The stinging cells which are organs of offense and defense are called

        A. defense cells
        B. flame cells
        C. nematocysts
        D. bulbs


MCQ 1624: The hormones of the human body are transported to target sites via

        A. cells
        B. blood
        C. plasma
        D. serum


MCQ 1625: The breakdown of alveoli is called

        A. asthma
        B. tuberculosis
        C. emphysema
        D. diarrhea


MCQ 1626: Photosynthesis occurs in the time of

        A. day
        B. night
        C. mid night
        D. all the time


MCQ 1627: In the brain, the Gray matter is made up of

        A. myelinated nerve fibers
        B. non-myelinated nerve fibers
        C. axons and cell bodies
        D. cell bodies only


MCQ 1628: The organ which lies ventral to esophagus extending in the chest cavity is a tubular structure called

        A. intestine
        B. trachea
        C. glottis
        D. lungs


MCQ 1629: Poikilotherms fluctuate more or less with

        A. ambient temperature
        B. heat shock proteins
        C. hydrostatic temperature
        D. thermal static temperature


MCQ 1630: The first layer that is formed between the primary walls of neighboring cells is called

        A. primary lamella
        B. middle lamella
        C. secondary lamella
        D. tertiary lamella


MCQ 1631: The amount of blood flow in the capillaries is regulated by the help of precapillary

        A. valves
        B. apertures
        C. sphincters
        D. semi lunar valves


MCQ 1632: The female digger wasp because of instincts

        A. catches caterpillars
        B. prepares a nest
        C. kills caterpillars by sting
        D. all of above


MCQ 1633: The elimination of undigested food material out of the body is called as

        A. assimilation
        B. absorption
        C. digestion
        D. egestion


MCQ 1634: When HIV invades in an individual, it destroys its

        A. nervous system
        B. digestive system
        C. circulatory system
        D. immune system


MCQ 1635: Hind limbs consist of which of these?

        A. appendages only
        B. pelvic girdle only
        C. axon
        D. appendages and pelvic girdle


MCQ 1636: The baby resulting from zygote as a result of in-vitro fertilization outside the female body is known as

        A. fraternal twin
        B. identical twin
        C. test tube baby
        D. genetic baby


MCQ 1637: The process of formation of germ layers is called

        A. fertilization
        B. gastrulation
        C. gamete formation
        D. growth


MCQ 1638: Fertilization in chick normally takes place just as the ovum is entering the

        A. uterus
        B. ureter
        C. oviduct
        D. ovary


MCQ 1639: The message is transmitted across the synapse in the form of chemical messengers called

        A. neuro hormones
        B. neurotransmitters
        C. neuro receptors
        D. neuro senders


MCQ 1640: Hydrolytic enzymes which help in dissolving food particle are present on

        A. mitochondria
        B. golgi complex
        C. lysosomes
        D. ribosome's


MCQ 1641: Most land mammals used to raise their fur to block still air hence protect themselves against

        A. hot
        B. cold
        C. pressure
        D. predators


MCQ 1642: The largest living vertebrates are known to be

        A. whales
        B. crocodiles
        C. sharks
        D. dinosaurs


MCQ 1643: The heart of class Cyclostomata have a heart with one

        A. ventricle
        B. auricle
        C. artery
        D. vein


MCQ 1644: Food material moves to the esophagus with the help of

        A. stomach
        B. longitudinal muscles
        C. circular muscles
        D. gravity


MCQ 1645: Chemical reactions are accelerated by high

        A. concentration
        B. ph
        C. temperature
        D. density


MCQ 1646: Alcoholic fermentation and Lactic acid fermentation are

        A. aerobic
        B. anaerobic
        C. partially aerobic
        D. partially anaerobic


MCQ 1647: The primary male sex hormone produced by the male reproductive system is

        A. gibberellins
        B. testosterone
        C. adrenalin
        D. thyroxine


MCQ 1648: The enzyme which dissolves the wall of a bacteria is

        A. lactase
        B. lysozyme
        C. sucrase
        D. fructase


MCQ 1649: Cloning helps produce desired varieties of

        A. animals only
        B. plants only
        C. humans
        D. animals and plants


MCQ 1650: Somatotrophin releasing factor is secreted from the hypothalamus in

        A. early childhood
        B. till puberty
        C. through out the life
        D. old age


MCQ 1651: Important well-known ferns are Dryopteris, Pteris Pteridium and

        A. equisetum adiantum
        B. adiantum equisetum
        C. equisetum
        D. adiantum


MCQ 1652: For the very first time, the vaccination against HIV was synthesized and was administered in humans in

        A. 2010
        B. 2008
        C. 2001
        D. 1998


MCQ 1653: In a coordination system, Reflex action is a/an

        A. involuntary action
        B. semi-voluntary action
        C. voluntary action
        D. manual action


MCQ 1654: The organisms which are associated with each other by a mutual nutrition process are called

        A. saprophytic
        B. autotrophic
        C. symbiotic
        D. none of others


MCQ 1655: The approximate number of species that are currently known to scientists are

        A. 2000000
        B. 2100000
        C. 2500000
        D. 2300000


MCQ 1656: The capacity of human blood to carry oxygen is raised to 75 times by

        A. white blood cells
        B. platelets
        C. hemoglobin
        D. coagulants


MCQ 1657: Genetic variability in plants is higher due to

        A. self pollination
        B. mitosis
        C. cross pollination
        D. meiosis


MCQ 1658: Through internal fertilization, offspring are produced by how many different methods?

        A. two
        B. three
        C. four
        D. five


MCQ 1659: Two shells which lie with each other, forming the shape of a petri-dish is the cell wall of

        A. tri atoms
        B. diatoms
        C. tetratoms
        D. pentatoms


MCQ 1660: The free-living species that feed on small animals and bodies of dead and decaying is

        A. spleen
        B. liver worts
        C. Adiantum
        D. Planaria


MCQ 1661: The structure of the lungs are

        A. elastic only
        B. spongy only
        C. hard
        D. elastic and spongy


MCQ 1662: The method in which fertilized egg is retained within the female's body is called

        A. oviparity
        B. ovoviparity
        C. viviparity
        D. viparity


MCQ 1663: The viruses which are responsible for tumors in animals and plants are

        A. Congo virus
        B. Human Immunodeficiency Virus (HIV)
        C. retroviruses
        D. Hepatitis B Virus (HBV)


MCQ 1664: Birds belong to which class?

        A. cold blooded
        B. homoeothermic
        C. poikilothermic
        D. heterothermic


MCQ 1665: Horneophyton, psilophyta, and cooksonia belong to the Tracheophytes group called

        A. anthoceropsida
        B. psilopsida
        C. byopsida
        D. bryopsida


MCQ 1666: The leaf of a lycopodium is small and contains single undivided vascular supply, such leaf is called

        A. macrophyll
        B. microphyll
        C. aphyll
        D. mesophyll


MCQ 1667: During the cell division phase, the number of cells increases by

        A. meiosis
        B. mitosis
        C. multiple fission
        D. budding


MCQ 1668: The discharge of blood and cell debris in case of no fertilization is called

        A. ovulation
        B. menupause
        C. menstruation
        D. oestrous cycle


MCQ 1669: Of all the environmental factors the two most important ones controlling the growth of plants are

        A. temperature and light
        B. temperature and oxygen
        C. oxygen and water
        D. oxygen and carbon dioxide


MCQ 1670: The transport and returning of material from the tissues to blood is the responsibility of

        A. Nervous system
        B. Circulatory system
        C. Lymphatic system
        D. Muscular system


MCQ 1671: When air rushes into the vacuum inside of the lungs, it constitutes the process of

        A. inspiration
        B. expiration
        C. inhalation
        D. exobreath


MCQ 1672: The male gametes reach to embryo sac by the help of

        A. pedicel
        B. petal
        C. pollen tube
        D. pith


MCQ 1673: Neurotransmitter molecules are released into

        A. microscopic gap
        B. cell body of next neuron
        C. axon of next neuron
        D. synaptic cleft


MCQ 1674: The cable containing numerous nerve fibers, the axons and dendrites is called a

        A. cord
        B. nerve
        C. neuron
        D. strand


MCQ 1675: The first microbe which has completely arranged genome in the sequence is

        A. Haemophilus influenza
        B. influenza
        C. hemolytic virus
        D. Hepatitis


MCQ 1676: The approach in which disastrous diseases are being controlled using appropriate methods is

        A. Integrated disease management
        B. retrograded disease management
        C. transmission disease management
        D. sensory disease management


MCQ 1677: The organism produced as a result of cloning is genetically identical to the parent who contributed the

        A. egg
        B. nucleus
        C. zygote
        D. all of above


MCQ 1678: The more complex form of life is a product of

        A. meiosis only
        B. genetic recombination only
        C. mitosis
        D. meiosis and genetic recombination


MCQ 1679: Vitamin deficiencies are induced in plants if they are grown in

        A. light
        B. dark
        C. moist places
        D. dry environment


MCQ 1680: The waste material is generated through metabolism, hence are termed as

        A. metabolic wastes
        B. catabolic wastes
        C. anabolic wastes
        D. Integrated waste


MCQ 1681: In the reproduction system, Oviduct is also called

        A. fallopian tube only
        B. uterine tube only
        C. urethra
        D. fallopian and uterine tube


MCQ 1682: The branches of Crataegus give excellent wood, which can be used to make

        A. walking sticks
        B. furniture
        C. toys
        D. cupboards


MCQ 1683: Slime molds appear slimy and stream on decaying logs and leaf litter due to the presence of

        A. plasmodium
        B. calcium
        C. starch
        D. magnesium


MCQ 1684: Cloned animals cannot withstand

        A. out break of a disease
        B. environmental changes
        C. epidemics
        D. all of above


MCQ 1685: Flagellates rely on dead or decomposing organic matter to obtain its

        A. food
        B. air
        C. water
        D. transport


MCQ 1686: Absence of which is a characteristic of the hydra?

        A. sensory, motor and relay neurons
        B. sense organs
        C. brain
        D. all of above


MCQ 1687: Eutheria is class of mammals which include placental mammals including

        A. birds
        B. reptiles
        C. humans
        D. spiders


MCQ 1688: Platelets have no pigment as well as no

        A. cell wall
        B. nucleus
        C. cytoplasm
        D. cell membrane


MCQ 1689: The class of angiosperm which contain two cotyledons are called

        A. monocotyledons
        B. dicotyledons
        C. tricotyledons
        D. multicotyledons


MCQ 1690: The backflow of blood in veins is controlled by

        A. bicuspid valves
        B. tricuspid valves
        C. semi valves
        D. semi lunar valves


MCQ 1691: In transpiration, the water leaves the cell of plants in the form of

        A. ice
        B. water droplets
        C. sugars
        D. dew


MCQ 1692: The most simpler sugars which are sweet and highly soluble in water are called

        A. Polysaccharides
        B. Monosaccharide's
        C. Disaccharides
        D. Oligosaccharides


MCQ 1693: Thickening of the uterine wall is done by

        A. progesterone
        B. oxytocin
        C. oestrogen
        D. thyroxine


MCQ 1694: The mucous membrane of the urinogenital tract is affected in

        A. gonorrhea
        B. syphilis
        C. genital herpes
        D. acquired immune deficiency syndrome (AIDS)


MCQ 1695: The sperm that queen bee receives from the male is

        A. fertilizes the egg
        B. stored in a pouch
        C. destroyed by the bacteria
        D. destroyed by the virus


MCQ 1696: The nucleus in Acetabularia lies in the

        A. stalk
        B. cap
        C. base
        D. gills


MCQ 1697: Any abnormality related to rhythm and conduction of heart can be diagnosed with the help of

        A. Electrocardiogram (ECG)
        B. Pace maker
        C. In Vitro Fertilization-C (IVFC)
        D. Angiography


MCQ 1698: The cartilaginous joint which is found in a growing bone is called

        A. fibrous cartilage
        B. synovial cartilage
        C. hinge cartilage
        D. Hyaline cartilage


MCQ 1699: Nicotine may induce which of the following?

        A. vomiting
        B. constipation
        C. infections
        D. bloating


MCQ 1700: The end product of glycolysis is

        A. glucose
        B. pyruvic acid
        C. citric acid
        D. glycogen


MCQ 1701: Seed plants are predominantly seen all around us due to good characteristics like

        A. modification of flower
        B. inflorescence for pollination
        C. gamete transfer by pollen tubes
        D. all of above


MCQ 1702: The maximum oxygen can be absorbed at a level of

        A. sea
        B. beach
        C. pond
        D. dam


MCQ 1703: The class Cyclostomata includes the living vertebrates which are most primitive and lack

        A. brain
        B. alimentary canal
        C. jaws
        D. teeth


MCQ 1704: A pair of ovoid glandular structures responsible for the production of sperms are called

        A. testes
        B. ovaries
        C. cervix
        D. sperm duct


MCQ 1705: The inverse response from effectors towards external change is called

        A. positive feedback
        B. negative feedback
        C. neutral feedback
        D. no feedback


MCQ 1706: The nutritional part of a neuron is

        A. axon
        B. node
        C. soma or cell body
        D. dendrites


MCQ 1707: The capacity to identify foreign invaders and take actions with the help of cells to remove that foreign invader with effectiveness, is termed as

        A. hypertension
        B. thermoregulation
        C. homeostasis
        D. immunity


MCQ 1708: The human brain is mainly divided into how many parts?

        A. two
        B. three
        C. four
        D. five


MCQ 1709: Cleavage of the zygote is spiral and determinate in

        A. protrostomia
        B. deutrostomia
        C. tritrostomia
        D. multitrostomia


MCQ 1710: The cells of dinoflagellates are covered with shells of interlocking cellulose plates, which are impregnated with

        A. calcium
        B. silicates
        C. phosphorus
        D. sulfates


MCQ 1711: In animals, with structural adaptations, have sweat glands and lungs for

        A. excretion
        B. respiration
        C. panting
        D. loss of water


MCQ 1712: Auxins tend to inhibit which of these?

        A. fruit growth
        B. parthenocarpy
        C. abscission
        D. bud initiation


MCQ 1713: The double membranous sac which encloses a human heart is called as

        A. Epicardium
        B. Myocardium
        C. Endocardium
        D. Pericardial cavity


MCQ 1714: A stalk that connects pituitary gland to the brain is

        A. pituitary tube
        B. infundibulum
        C. ureter
        D. hypophysis cerebri


MCQ 1715: If more than one egg is produced by the female and all the eggs are independently fertilized, it will result in

        A. identical twins
        B. fraternal twins
        C. true twins
        D. monozygotic twins


MCQ 1716: For enzyme activity in the human body, the optimum temperature is

        A. 37c
        B. 34c
        C. 33c
        D. 32c


MCQ 1717: In the digestive system, the length of jejunum is

        A. 2m
        B. 2.1m
        C. 2.2m
        D. 2.4m


MCQ 1718: Asthmatic patients are prone to

        A. pollen
        B. spores
        C. humidity
        D. all of above


MCQ 1719: Feces are temporarily stored in

        A. anus
        B. rectum
        C. ileum
        D. jejunum


MCQ 1720: In a coordination system, Somatic nervous system controls

        A. voluntary movements
        B. reflex actions
        C. semi-voluntary movements
        D. involuntary movements


MCQ 1721: Tobacco requires the length of the dark period that is

        A. 8.5 h
        B. 7.5 h
        C. 6.5 h
        D. 5.5 h


MCQ 1722: Veins collect blood from the body and send it to

        A. liver
        B. lungs
        C. heart
        D. arteries


MCQ 1723: During childbirth, the baby is delivered as a result of

        A. cervix dilation
        B. uterine contraction
        C. oxytocin release
        D. all of above


MCQ 1724: The plant which attracts the insect to entangle is known as

        A. sundew
        B. pitcher plant
        C. venus flytrap
        D. none of others


MCQ 1725: The word luteinization means

        A. turning green
        B. turning yellow
        C. turning white
        D. turning blue


MCQ 1726: In plants, without the supply of oxygen

        A. no metabolic activity is possible
        B. metabolic activity occurs
        C. growth still occurs
        D. all of above


MCQ 1727: A commercial compound that breaks down to release methane in plants is known as

        A. ethaphon
        B. ethnoate
        C. ethephon
        D. ethyl


MCQ 1728: All the hormones move in the body via blood and

        A. lymphs
        B. plasma and bones
        C. plasma
        D. antigens


MCQ 1729: The two hormones produced in the hypothalamus are

        A. oxytocin and oestrogen
        B. oxytocin and testosterone
        C. oxytocin and antidiuretic hormone
        D. oxytocin and thyroxine


MCQ 1730: In the adequate or surplus supply of water, the reabsorption in kidneys is

        A. reduced
        B. enhanced
        C. increase
        D. neutral


MCQ 1731: The ball of capillaries which surrounds the Bowman's capsule is called

        A. glomerulus
        B. Bowman's capsule
        C. medulla
        D. Bowman's man


MCQ 1732: Oxygen is less soluble as compared to carbon dioxide, this is

        A. TRUE
        B. FALSE
        C. to some extent true
        D. not true at all


MCQ 1733: The specialized molecule which traps high energy electron and electron carriers are

        A. primary acceptor
        B. electron acceptor
        C. primary electron acceptor
        D. electron acceptor


MCQ 1734: The opening of bud is achieved when leaf in bud condition shows more

        A. transpiration
        B. growth
        C. respiration
        D. photosynthesis


MCQ 1735: An intact cell body of a neuron can

        A. multiply infinitely
        B. regenerate axonal and dendrite fibers
        C. cannot regenerate axonal and dendrite fibers
        D. never dies


MCQ 1736: Secondary growth leads to an increase in

        A. thickness
        B. height
        C. length
        D. no. of flowers


MCQ 1737: External fertilization occurs in the

        A. fish
        B. crabs
        C. shrimp
        D. all of above


MCQ 1738: The proteins which defend the body against pathogens are called

        A. antibiotics
        B. antibodies
        C. antifungal
        D. anti-inflammatory


MCQ 1739: Green algae stores energy in the form of

        A. sugar
        B. starch
        C. proteins
        D. minerals


MCQ 1740: In 1797, vaccination was first developed by

        A. Edward Jenner
        B. F. Sanger
        C. F.Miescher
        D. Erwin


MCQ 1741: Spemann performed experiments on zygote of

        A. hydra
        B. salamander
        C. sea urchin
        D. turtle


MCQ 1742: In jellyfish, poly is reduced and medusae are

        A. low
        B. recessive
        C. dominant
        D. high


MCQ 1743: The jumping impulse at the node of Ranvier is called

        A. saltatory impulse
        B. stationary impulse
        C. speedy impulse
        D. ranvier impulse


MCQ 1744: The modification of proteins and lipids by converting them into glycoprotein and glycolipids are done by

        A. DNA
        B. mitochondria
        C. Golgi complex
        D. RNA


MCQ 1745: The most abundant and most important photosynthetic pigment is

        A. chlorophyll-a
        B. chlorophyll-b
        C. chlorophyll-c
        D. chlorophyll-d


MCQ 1746: The older sediment layers have less radioactive isotopes than

        A. upper layer
        B. younger layer
        C. older layer
        D. deeper layer


MCQ 1747: An organic molecule is a type of molecule in which a molecule is composed of

        A. hydrogen
        B. carbon
        C. carbon and hydrogen
        D. oxygen


MCQ 1748: A young bird in the absence of parent may imprint

        A. other species of birds
        B. human beings
        C. inanimate objects
        D. all of above


MCQ 1749: Oxytocin during childbirth particularly acts on

        A. cardiac muscles
        B. skeletal muscles
        C. smooth muscles
        D. circular muscles


MCQ 1750: Inhaling the spores of a fungus which is contaminated in the soil can lead to a serious infection of lungs called

        A. histoplasmosis
        B. hysteria
        C. epilepsy
        D. asthma


MCQ 1751: Primary tissue is added by which?

        A. apical meristem
        B. lateral meristem
        C. intercalary meristems
        D. tropical meristem


MCQ 1752: A definite shape given to the cell is by

        A. cell membrane
        B. ribosome
        C. cell wall
        D. nucleus


MCQ 1753: Urea in high concentration may cause damage to fishes so they retain a protecting chemical against urea called

        A. trimethyloxide
        B. methyl oxide
        C. hydrogen oxide
        D. hydrogen peroxide


MCQ 1754: A statement which is given after observations and organizing data is called a

        A. reasoning
        B. result
        C. hypothesis
        D. experiment


MCQ 1755: When growth has mostly ceased after adolescence, the hormone that continues to promote protein synthesis throughout the body is

        A. Thyroid Stimulating Hormone (TSH)
        B. Somatotrophin Hormone (STH)
        C. Gonadotrophic Hormone (GH)
        D. Corticotrophic Hormone (CH)


MCQ 1756: The exchange of gasses through diffusion takes place when there is a difference in

        A. partial pressure
        B. liquid pressure
        C. hydraulic pressure
        D. concentration gradient


MCQ 1757: The red blood cells of mammals are

        A. mono-nucleated
        B. di-nucleated
        C. non-nucleated
        D. nucleated


MCQ 1758: The disease myxoedema is characterized by

        A. swelling of the neck
        B. puffiness of hands skin
        C. puffiness of eyes
        D. pain in joints


MCQ 1759: When starches are mixed with iodine, they give a color which is

        A. violet
        B. blue
        C. green
        D. purple


MCQ 1760: The epithelium is only two cells thick which facilitates the process of

        A. respiration
        B. diffusion
        C. exchange
        D. inchange


MCQ 1761: The rhythmic contraction of the heart is controlled by

        A. circulatory system
        B. immune system
        C. autonomic nervous system
        D. peripheral nervous system


MCQ 1762: The animals which do not require to adjust osmotic state concerning their external environment, are termed as

        A. osmoregulators
        B. osmoconformers
        C. thermoregulators
        D. thermoconformers


MCQ 1763: Chondrus polyphonic whose common name is red algae belongs to the phylum

        A. chordata
        B. protozoa
        C. parazoa
        D. rhodophyta


MCQ 1764: Cytochrome is oxidized by which of the following?

        A. atom of oxygen only
        B. electrons only
        C. protons
        D. atoms of oxygen and electrons


MCQ 1765: A person suffering from epilepsy should avoid

        A. tea
        B. coffee
        C. alcohol
        D. fizzy drinks


MCQ 1766: The mechanical process which consists of two phases inspiration and expiration is called

        A. respiration
        B. breathing
        C. photosynthesis
        D. translocation


MCQ 1767: During dark reactions, the photosynthesis takes place by the help of certain enzymes through the cycle called

        A. Krebs cycle
        B. life cycle
        C. calvin cycle
        D. nitrogen cycle


MCQ 1768: The molecular formula of a disaccharide is

        A. C12H22O12
        B. C11H22O12
        C. C12H22O11
        D. C6H12O6


MCQ 1769: Harmful chemicals and toxins are disposed of from the body by the help of

        A. lungs
        B. kidneys
        C. liver
        D. all of above


MCQ 1770: Gastrin hormone stimulated by which?

        A. carbohydrates
        B. vitamins
        C. proteins
        D. calcium


MCQ 1771: The complex cartilaginous structure present at the upper end of the trachea is called

        A. pharynx
        B. larynx
        C. glottis
        D. epiglottis


MCQ 1772: Aphids suck phloem juices with the help of its

        A. antennae
        B. stylets
        C. siphon
        D. mouth


MCQ 1773: The method in which the young one develops within the female body and it receives nourishment from mother's blood is called

        A. oviparity
        B. ovoviparity
        C. viviparity
        D. viparity


MCQ 1774: Prolactin stimulates the production of which?

        A. red blood cells
        B. keratin
        C. milk
        D. lactose


MCQ 1775: A darkly stained body within a nucleus without any prominent membranous boundary is

        A. nucleolus
        B. vacuole
        C. ribosomes
        D. mitochondria


MCQ 1776: In kingdom Plantae, the pine is a

        A. flowering tree
        B. cones
        C. conifer
        D. leaf


MCQ 1777: If any artery which is supplying blood to brain leaks or discharges blood burst, such artery is called

        A. hemorrhage
        B. stroke
        C. hypertension
        D. myocardial infarction


MCQ 1778: The oxygen combines with hemoglobin in the blood and form

        A. oxyhemoglobin
        B. deoxyhemoglobin
        C. hemoglobin
        D. carbohemoglobin


MCQ 1779: An animal which can survive in drastic conditions of the desert by feeding on seeds of plants containing more carbohydrates is

        A. camel
        B. Scorpio
        C. kangaroo rat
        D. none of others


MCQ 1780: A less conspicuous generation which partially or completely depends upon gametophyte for its nutrition is a

        A. sporophyte
        B. saprophyte
        C. prophyte
        D. symbion


MCQ 1781: The folds of ileum in the shape of finger-like outgrowths are called

        A. microvillus
        B. lumen
        C. villi
        D. cilia


MCQ 1782: If sea urchin egg at the two-cell stage is shaking to separate the two cells, they both

        A. die
        B. develop into normal larvae
        C. grow abnormally
        D. develop into abnormal larvae


MCQ 1783: Reflex movement of eyes is controlled by

        A. forebrain
        B. midbrain
        C. hindbrain
        D. future brain


MCQ 1784: The shape of the pituitary gland is

        A. circle
        B. square
        C. triangular
        D. ovoid


MCQ 1785: Bats and hummingbirds belong to which group?

        A. endotherms
        B. ectotherms
        C. heterotherms
        D. hypotherms


MCQ 1786: The nerves associated with head, neck and facial regions are

        A. spinal nerves
        B. cranial nerves
        C. mixed nerves
        D. motor nerves


MCQ 1787: In the honey bee, males are haploid and produce sperms by

        A. meiosis
        B. budding
        C. mitosis
        D. layering


MCQ 1788: At high temperatures, mesophyll cells release a hormone called

        A. citric acid
        B. maleic acid
        C. abscisic acid
        D. sulfuric acid


MCQ 1789: From the two cells of salamander zygote, the one that kept dividing had

        A. mitochondria
        B. nucleus
        C. ribosomes
        D. golgi apparatus


MCQ 1790: Species of Mimosaceae which help to break the wind pressure are

        A. propis
        B. prosopis
        C. mimopis
        D. postopis


MCQ 1791: Fruit ripening is often accompanied by a burst of respiratory activity called

        A. climacteric
        B. oxidation
        C. reduction
        D. bursting


MCQ 1792: Actinipods are made up of which element?

        A. silica
        B. calcium
        C. sulphur
        D. granite


MCQ 1793: The break down of food particles into smaller particles is the process of

        A. lubrication
        B. mastication
        C. swallowing
        D. peristalsis


MCQ 1794: The exchange of gases in the bark of plants Is attained by the help of

        A. stomata
        B. roots
        C. lenticels
        D. cuticle


MCQ 1795: The appearance of dendrites is like that of a

        A. tree
        B. circle
        C. leaf
        D. net


MCQ 1796: Which one is the Planarian excretory system?

        A. protonephridium
        B. metanephridium
        C. Malpighian tubules
        D. etanephridium


MCQ 1797: The molluscan body possesses which type of skeleton?

        A. exoskeleton
        B. hydrostatic skeleton
        C. endoskeleton
        D. all of above


MCQ 1798: The 14 phalanges of the toe are attached to

        A. metacarpals
        B. metatarsals
        C. carpals
        D. tarsals


MCQ 1799: Necrosis following the death of surrounding neural tissues in the blood vessels in the brain can block and leads towards

        A. hypertension
        B. cerebral infarction
        C. myocardial infarction
        D. stroke


MCQ 1800: The metabolism of purine and pyrimidine results in the formation of a significant amount of

        A. xanthine, hypoxanthine
        B. uric acid, allantoin
        C. urea, ammonia
        D. all of above


MCQ 1801: The vein which collects blood from the liver is known as

        A. renal vein
        B. hepatic vein
        C. hepatic portal vein
        D. iliac vein


MCQ 1802: Lateral meristems are present in

        A. dicots only
        B. gymnosperms only
        C. monocots
        D. dicots and gymnosperms


MCQ 1803: When a person becomes ill due to infection and survives, this activity is called

        A. naturally induced immunity
        B. auto-immune response
        C. immuno-survival
        D. none of others


MCQ 1804: Powerful growth zones found at the apices of roots and stem are called

        A. lateral meristems
        B. apical meristems
        C. intercalary meristems
        D. virtual meristems


MCQ 1805: The most toxic excretory product which quickly dissolves in body fluids is

        A. urea
        B. ammonia
        C. uric acid
        D. creatine


MCQ 1806: The cells of plants in deficiency of water synthesize large quantities of proteins called

        A. lipo proteins
        B. heat shock proteins
        C. heat protein
        D. glycol proteins


MCQ 1807: Corpus luteum starts degenerating if

        A. fertilization occurs
        B. fertilization does not occur
        C. too much estrogen is released
        D. pollination occurs


MCQ 1808: The unequal branches of the stem which grew unequally at different rates given rise to different planes, this development is

        A. planation
        B. budding
        C. overtopping
        D. webbing


MCQ 1809: Cytokinins delay aging of which?

        A. cabbage and lettuce
        B. pears
        C. tangerines
        D. pineapple


MCQ 1810: The best remedy against an osteoporotic bone fracture is

        A. Estrogen Replacement Therapy
        B. sun exposure
        C. surgery
        D. realignment


MCQ 1811: Swelling of the neck due to deficiency of thyroxine is termed as

        A. cretinism
        B. graves' disease
        C. goiter
        D. rickets


MCQ 1812: The fruit is developed from the ovary wall and

        A. stamen
        B. tegmen
        C. sepal and stamen
        D. petal


MCQ 1813: The cell theory was given after working independently by

        A. Theodore
        B. F. Sanger
        C. Schneider
        D. Robert brown


MCQ 1814: The destruction of the adrenal cortex occurs in

        A. Adam's disease
        B. Addison's disease
        C. Cushing's disease
        D. arthritis


MCQ 1815: Species of fungi that are used to give flavor, aroma, and color to cheese are

        A. penicillum
        B. smut
        C. rust
        D. green


MCQ 1816: In peritoneal dialysis, the peritoneal cavity is filled with dialysis fluid through a

        A. valve
        B. catheter
        C. sphincter
        D. pump


MCQ 1817: Less amount of nitrogen is present in

        A. creatinine
        B. creatine
        C. trimethylamine oxide
        D. all of above


MCQ 1818: Utilization of carbon dioxide from air and water from the soil to manufacture glucose is done by

        A. animals
        B. plants
        C. humans
        D. bacteria


MCQ 1819: The resolution of a human naked eye is

        A. 2.0mm
        B. 1.0mm
        C. 3.0mm
        D. 0.2mm


MCQ 1820: The opening of the larynx is called

        A. glottis
        B. epiglottis
        C. vocal cords
        D. soft palate


MCQ 1821: Cell elongation takes place is favored by

        A. blue light
        B. red light
        C. white light
        D. brown light


MCQ 1822: The number of chemical compounds from which living organisms are made is

        A. 92
        B. 16
        C. 20
        D. 108


MCQ 1823: Insulin and glucagon belong to the

        A. amino acid and derivatives
        B. proteins
        C. polypeptides
        D. steroids


MCQ 1824: Energy to the growing plants is supplied by

        A. hormones
        B. nutrients
        C. oxygen
        D. carbon dioxide


MCQ 1825: Melanophore stimulating hormone darkens the skin by stimulating

        A. melanocytes
        B. monocytes
        C. erythrocytes
        D. lymphocytes


MCQ 1826: The presence of bony brain in chordates is called as

        A. chordates
        B. notochord
        C. tunicates
        D. craniates


MCQ 1827: For cloning of an animal, the nucleus is taken from a

        A. somatic cell
        B. reproductive cell
        C. gamete
        D. nerve cell


MCQ 1828: Mammals have a special organ for rapid heat production called

        A. yellow fat
        B. brown fat
        C. grey fat
        D. white fat


MCQ 1829: Organisms produced from a single cell by subculturing are called

        A. copies
        B. clones
        C. replicas
        D. partners


MCQ 1830: Passive immunity is developed by injecting antibodies in the form of

        A. anti-bacterial
        B. anti-fungal
        C. anti-serum
        D. antis era


MCQ 1831: In America, roads are made by using tar mixed with shells of

        A. snail
        B. turtle
        C. oyster
        D. sea anemone


MCQ 1832: When the folding of the neural plate is visible, the embryo is termed as

        A. neurula
        B. gastrula
        C. blastula
        D. staticula


MCQ 1833: The adaptive changes in individual behavior as a result of experience are termed as

        A. learning
        B. behavior
        C. taxes
        D. instincts


MCQ 1834: The bacterial membrane is deprived of

        A. enzymes
        B. sterols
        C. proteins
        D. sugar


MCQ 1835: The digesting enzyme which digest starch and glycogen is called

        A. glucase
        B. sucrase
        C. ptyalin
        D. fructase


MCQ 1836: The activity in which larger molecules are broken down into small molecules utilizing water is known as

        A. hydration
        B. hydrolysis
        C. ionization
        D. vaporization


MCQ 1837: Microorganisms taken in along with food are killed by

        A. gastric juice
        B. hydrochloric acid
        C. citric acid
        D. pepsin


MCQ 1838: The study of energy relationships and energy conversions in biological systems is termed as

        A. microbiology
        B. biotechnology
        C. bioenergetics
        D. biophysics


MCQ 1839: The active membrane potential of a neuron is

        A. 0.05 volts
        B. 0.07 volts
        C. 0.08 volts
        D. 0.09 volts


MCQ 1840: A seed may be defined as a fertilized

        A. ova
        B. ovule
        C. oospore
        D. archegonium


MCQ 1841: Cockroach cut food into smaller particles with the help of

        A. mandibles
        B. crop
        C. gizzard
        D. rectum


MCQ 1842: The receptors which respond to stimuli of light are

        A. Mechanoreceptors
        B. Photoreceptors
        C. Chemoreceptors
        D. Nociceptors


MCQ 1843: Fatty acids which are straight-chained are found in

        A. animals
        B. plants
        C. micro-organisms
        D. unicellular plants


MCQ 1844: The most successful group of seed plants are

        A. Angiosperms
        B. Gymnosperms
        C. androsperms
        D. rhodosperms


MCQ 1845: The ovum, after release, is then transferred to the

        A. oviduct
        B. sperm duct
        C. vas deferens
        D. epididymis


MCQ 1846: Fruits and leaves have a natural protective coating of fatty acids known as

        A. waxes
        B. oil
        C. cutin
        D. cell wall


MCQ 1847: Procuticle is further hardened by which component?

        A. sclerotization
        B. calcium carbonate
        C. magnesium sulfate
        D. all of above


MCQ 1848: Saccharomyces cerevisiae is the most common exploited

        A. yeast
        B. fungus
        C. algae
        D. mosses


MCQ 1849: Animals maintain the concentration of salts and water in their body by adopting

        A. diffusion
        B. osmosis
        C. osmoregulation
        D. exosmosis


MCQ 1850: The sporophytes which are differentiated into roots, stem and true leaves, constitute the plants of

        A. hepaticopsida
        B. anthoceropsida
        C. lycopsida
        D. bryopsida


MCQ 1851: In plants, when only apical buds grow and growth is suppressed in lower axillary buds, it is called

        A. sprouting
        B. apical dominance
        C. germination
        D. compensation


MCQ 1852: Red blood is formed in which part of the body?

        A. sternum
        B. ribs
        C. vertebrae
        D. all of above


MCQ 1853: The tube by which urine is passed outside the body is called

        A. pelvis
        B. urinary bladder
        C. urethra
        D. ureter


MCQ 1854: Failure to produce insulin leads to a condition called

        A. diabetes insipidus
        B. diabetes mellitus
        C. hypoglycemia
        D. rickets


MCQ 1855: A nucleotide is the combination of 3 subunits, i.e. a pentose sugar, a nitrogenous base and

        A. acetic acid
        B. phosphoric acid
        C. maleic acid
        D. alcohol


MCQ 1856: Plants and animals which are in danger of extinct if not protected are studied under the name

        A. enraged species
        B. multicellular species
        C. endangered species
        D. unicellular species


MCQ 1857: All the biologists believe that virtually, all the animals have been evolved from

        A. protoctist
        B. bryophytes
        C. monera
        D. porifera


MCQ 1858: The process of flow of sap from the injured or cut parts of the plant with a considerable force is called

        A. imbition
        B. budding
        C. bleeding
        D. leaking


MCQ 1859: There are two types of starch which are amylose and

        A. pectin
        B. amylopectin
        C. agar
        D. dextrin


MCQ 1860: Atropa Belladonna is used for medicine because it is rich in

        A. atrocone
        B. Atropine
        C. pine
        D. atripine


MCQ 1861: A scientist who first determined the sequence of amino acids in a protein molecule was

        A. F.Sanger
        B. Edward Jenner
        C. Erwin Chargaff
        D. F. Miescher


MCQ 1862: Fishes heart work only in one direction thus called

        A. unit circuit
        B. single heart circuit
        C. round circuit
        D. open circuit


MCQ 1863: Cortisone hormone belongs to the family of

        A. amino acid and derivatives
        B. proteins
        C. polypeptides
        D. steroids


MCQ 1864: Today the size of a living world is

        A. small
        B. balanced
        C. average
        D. enormous


MCQ 1865: Medulla oblongata narrows down into an oval-shaped hollow cylinder called

        A. vertebral column
        B. spinal cord
        C. bone marrow
        D. cable


MCQ 1866: The ability of regeneration is present in

        A. lobster
        B. sponges
        C. starfish
        D. all of above


MCQ 1867: The three sites of digestion in human beings are

        A. small intestine
        B. oral cavity
        C. stomach
        D. all of above


MCQ 1868: The average loss of blood during childbirth is

        A. 100 cm
        B. 350 cm
        C. 250 cm
        D. 150 cm


MCQ 1869: The mechanism of enzyme activity is termed as

        A. hydrolysis
        B. catalysis
        C. proteolysis
        D. hydration


MCQ 1870: Stage two of differentiation involves

        A. recognition of apical meristems
        B. formation of embryo
        C. recognition of cambium
        D. production of leaf primordial


MCQ 1871: Protozoa ingest their food by the process of

        A. paracytosis
        B. exocytosis
        C. endocytosis
        D. ectocytosis


MCQ 1872: Two molecules which belong to different categories combine to form

        A. a complex molecule
        B. conjugated molecule
        C. compound molecule
        D. double molecule


MCQ 1873: Lack of chlorophyll in plants is called

        A. chlorosis
        B. nitrogen deficiency
        C. magnesium deficiency
        D. green deficiency


MCQ 1874: Biosynthesis of materials necessary for the growth of neurons is a concern of

        A. axon
        B. cell body or soma
        C. dendron
        D. node


MCQ 1875: Busra of Fabricius is found in the wall of cloacae opening of young bird which proved the role of it in

        A. excretory system
        B. immune system
        C. digestive system
        D. oral cavity


MCQ 1876: Clostridium botulinum causes a severe form of

        A. botulism
        B. obesity
        C. piles
        D. ulcer


MCQ 1877: Amylopectin starches are soluble in both hot and cold water and they have

        A. branched chains
        B. unbranched chains
        C. glycosidic linkage
        D. ring corners


MCQ 1878: Macromolecules help in the formation of the cell because they are

        A. soluble
        B. insoluble
        C. stable
        D. instable


MCQ 1879: In ovoviviparous animals, the embryo receives its nourishment from

        A. mother's blood
        B. placenta
        C. egg white
        D. egg yolk


MCQ 1880: The flowers of the plant which close at night due to rapid growth in the lower side are

        A. rose
        B. mimosa
        C. ferns
        D. tulip


MCQ 1881: Growth is mainly divided into how many types?

        A. three
        B. two
        C. four
        D. five


MCQ 1882: The space between somatic mesoderm and splanchnic mesoderm is called

        A. coelom
        B. hypocoele
        C. epicoele
        D. mesocoele


MCQ 1883: When the exchange of gases takes place in the lungs, it is called

        A. diffusion
        B. osmosis
        C. pulmonary respiration
        D. active transport


MCQ 1884: Evolution of pollen tube is an important step in a land adaptation by

        A. spermatophytes
        B. bryophytes
        C. cycadophyta
        D. pinophyta


MCQ 1885: Vitamins fall in the category of which factor for growth?

        A. external
        B. internal
        C. neutral
        D. none of others


MCQ 1886: In the cell body of the neuron, there are some specialized granules named

        A. Ervin's granules
        B. Nissl's granules
        C. Alois's granules
        D. Darwin's granules


MCQ 1887: The inner end of nephrons is a cup-shaped swelling structure known as

        A. glomerulus
        B. Bowman's capsule
        C. medulla
        D. Bowman's net


MCQ 1888: Electrical impulses are sent to atrial muscles to contract both

        A. ventricles
        B. auricles
        C. atria
        D. arteries


MCQ 1889: The hormone produce their effect by

        A. initiating new biochemical reactions
        B. regulating already present chemical reactions
        C. synthesizing new compounds
        D. none of others


MCQ 1890: Amoeba and paramecium possess a specialized structure for removing water from the body, called

        A. contractile vacuoles
        B. flagella
        C. pseudopodia
        D. ligament


MCQ 1891: Improved storage life of bananas and grapefruits is a commercial application of

        A. cytokinins
        B. ethane
        C. gibberellin
        D. auxins


MCQ 1892: After passing a stimulus from receptors to sensory neurons, it then passes to

        A. effectors
        B. motor neurons
        C. associative neurons
        D. back to receptors


MCQ 1893: Cytoplasm present in the axon is called

        A. neuroplasm
        B. protoplasm
        C. axoplasm
        D. dendroplasm


MCQ 1894: A huge bacterium has been discovered in the intestine of brown surgeonfish and its size grow as large as 600µm by

        A. 60µm
        B. 80µm
        C. 40µm
        D. 20µm


MCQ 1895: The largest portion of the brain is

        A. hypothalamus
        B. cerebellum
        C. thalamus
        D. cerebrum


MCQ 1896: The blood vessels which carry the blood away from the heart are known as

        A. veins
        B. capillaries
        C. arteries
        D. lymph vessels


MCQ 1897: Plasma is composed of dissolved

        A. proteins
        B. salts
        C. wastes
        D. all of above


MCQ 1898: The fluid which is transmitted between blood bad interstitial fluid is called

        A. vessel
        B. thrombus
        C. embolus
        D. lymph


MCQ 1899: A very high supply of oxygen does what in plants?

        A. promotes growth
        B. inhibits growth
        C. does not influence growth
        D. stimulates enzyme action


MCQ 1900: Symptoms of cretinism include which one of these?

        A. coarse scanty hair
        B. mental retardation
        C. yellowish scaly skin
        D. all of above


MCQ 1901: The discoidal cap of cells above the blastocoele is called

        A. blastoderm
        B. blastocoele
        C. area opaca
        D. area pellucida


MCQ 1902: Peptone and polypeptides are yielded by the hydrolysis of

        A. pepsin
        B. lipase
        C. maltose
        D. amylase


MCQ 1903: Parthenogenesis has the advantage of accelerating the normal

        A. reproductive rate
        B. respiratory activity
        C. flowering
        D. growth


MCQ 1904: Homeostasis contributes to the evolutionary process by compelling

        A. adaptations
        B. regeneration
        C. erosion
        D. fluctuations


MCQ 1905: The system which is responsible for detecting change and signaling control system is called

        A. control system
        B. feedback mechanism
        C. osmoregulation
        D. thermoregulation


MCQ 1906: The processes conducting impulse away from the cell body are termed as

        A. dendrites
        B. axons
        C. dendron
        D. roots


MCQ 1907: Nissl's granules are present in which part of neurons?

        A. cell body
        B. Dendron
        C. axon
        D. dendrites


MCQ 1908: In diabetes, the patient produces large amounts of urine that are

        A. very concentrated
        B. mild
        C. acidic
        D. very dilute


MCQ 1909: Parthenocarpic fruits with no seeds are

        A. bananas
        B. pineapples
        C. oranges
        D. all of above


MCQ 1910: In apical, dominance action of auxins is enhanced by

        A. ethane
        B. oxytocin
        C. gibberellin
        D. Cytokinins


MCQ 1911: The trapped insect in insectivorous plants are decomposed by

        A. virus
        B. fungus
        C. bacteria
        D. algae


MCQ 1912: Tissue culturing can only be done for

        A. plant tissues
        B. animal cells
        C. both animal and plant cells
        D. atoms and ions


MCQ 1913: Hydra is a small animal and it belongs to the phylum

        A. porifera
        B. nematoda
        C. platyhelminthes
        D. cnidarian


MCQ 1914: The process of isolating various components of a cell is called

        A. cell division
        B. cell fractionation
        C. cell elimination
        D. cell separation


MCQ 1915: Root primordia develop from the root cambium called

        A. epicycle
        B. pericycle
        C. pericarp
        D. mesoderm


MCQ 1916: The shell of eggs produced by birds and turtles have a high concentration of

        A. sodium chloride
        B. magnesium
        C. calcium carbonate
        D. silicon


MCQ 1917: When there is no exchange between leaves and the atmosphere due to the balance of respiration and photosynthesis, this condition is known as

        A. balanced point
        B. unbalanced point
        C. redemption point
        D. compensation point


MCQ 1918: Constipation is caused by the over absorption of

        A. salts
        B. minerals
        C. water
        D. sugar


MCQ 1919: The respiration in fish is done by the help of paired

        A. fins
        B. gills
        C. operculum
        D. bladder


MCQ 1920: Artificial mode of reproduction in plants is

        A. layering
        B. grafting
        C. budding
        D. all of above


MCQ 1921: The example of bacteria which can be used as a pollution indicator is

        A. oscillatoria
        B. baccilatoria
        C. streptolatoria
        D. streptococcus


MCQ 1922: Skull is made up of which of these?

        A. cranium
        B. facial bones
        C. cartilage
        D. none of others


MCQ 1923: The process of fusion of egg and sperm results in the formation of

        A. clone
        B. zygote
        C. cell
        D. nymph


MCQ 1924: The outer portion of the spinal cord is made up of

        A. pink matter
        B. white matter
        C. yellow matter
        D. gray matter


MCQ 1925: The gastrocoel cavity is now termed as

        A. primitive pit
        B. primitive ridge
        C. primitive node
        D. primitive gut


MCQ 1926: Labor pain is caused by contractions in the walls of

        A. uterus
        B. cervix
        C. ovary
        D. endometrium


MCQ 1927: The word tropic is a Greek word in which 'Tropos' mean

        A. elongated
        B. turn
        C. straight
        D. zigzag


MCQ 1928: The painful burning sensation in chest due to the backflow of acidic chyme into the esophagus is termed as

        A. pyrosis
        B. heart attack
        C. inflammation of liver
        D. high blood pressure


MCQ 1929: The meristematic cells are located at the

        A. stem only
        B. root only
        C. flower
        D. stem and root


MCQ 1930: Intermediate/Relay is another name of

        A. associative neurons
        B. motor neurons
        C. sensory neurons
        D. neuroglia


MCQ 1931: The release of ovum from the follicle or ovulation is induced by

        A. Luteinizing Hormone (LH)
        B. Follicle Stimulating Hormone (FSH)
        C. Thyroid Stimulating Hormone (TSH)
        D. Somatotrophin Hormone (STH)


MCQ 1932: The body of sponges contain special out layer made up of cells called

        A. spongecytes
        B. cytes
        C. cnidocytes
        D. pinaocytes


MCQ 1933: A single parental organism which gives rise to offspring by mitotic cell division is called

        A. sexual reproduction
        B. asexual reproduction
        C. reduction division
        D. budding


MCQ 1934: The presence of metabolic waste in the body can cause serious hazards hence they should be

        A. retained
        B. consumed
        C. eliminated
        D. recycled


MCQ 1935: The relaxed period of heart chambers is known as

        A. systole
        B. diastole
        C. ventricular systole
        D. atrial diastole


MCQ 1936: The flagellated collar cells constitute the layer called

        A. choanoderm
        B. epiderm
        C. mesoderm
        D. endoderm


MCQ 1937: The type of behavior that depends on the hereditary material is

        A. learning behavior
        B. instinctive behavior
        C. habituation
        D. imprinting


MCQ 1938: The old xylem when not being used to transport deposit strange chemicals which take place in

        A. conifers
        B. ebony
        C. oak
        D. none of others


MCQ 1939: The process of engulfing solid particles in the form of vacuoles is called

        A. endycytosis
        B. phagocytosis
        C. pinocytosis
        D. ectocytosis


MCQ 1940: The technique in which cambium tissue is provided nutrients to grow and differentiate into a new plant is called

        A. gene sequencing
        B. tissue culture technique
        C. gene therapy
        D. genetic engineering


MCQ 1941: The female reproductive cycle may be disturbed by

        A. malnourishment only
        B. emotional stresses only
        C. over-eating
        D. malnourishment and emotional stress


MCQ 1942: NAA (naphthalene acetic acid ) helps in

        A. fruit setting
        B. abscission
        C. sprouting of potatoes
        D. leaf senescence


MCQ 1943: Which of the following is the lifestyle of the hydra?

        A. sedentary
        B. locomotory
        C. semi-sedentary
        D. none of others


MCQ 1944: The successive cells in pericardial muscles are separated with the help of junctions called as

        A. inoculated
        B. interstitial disc
        C. intercalated disc
        D. interlaced disc


MCQ 1945: A bacterial cell contains 70% of which?

        A. proteins
        B. water
        C. lipids
        D. DNA


MCQ 1946: The percentage of water in an average brain cell is

        A. 0.75
        B. 0.85
        C. 0.95
        D. 0.8


MCQ 1947: In case of no actual danger, the alarm calls of rodents are ignored. This behavior comes under

        A. learning
        B. instinctive behavior
        C. habituation
        D. taxes


MCQ 1948: Cyanobacteria use accessory pigments called

        A. glycogen
        B. phycobilins
        C. trichomes
        D. vibrio


MCQ 1949: The follicle-stimulating hormone in males stimulates the development of germinal epithelium of

        A. ovaries
        B. kidneys
        C. lungs
        D. testis