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IGCSE O Level Biology MCQs (O Level) From Textbook

IGCSE O Level Biology MCQs – Practice Test 7 (Chapter 15)

Respiration in Biology Quiz with Answers PDF Download – Test 7

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Free "Respiration in Biology Learning" App Download (Android & iOS): In context of respiration, inspired air has; MCQ with answers: more water vapors, less oxygen, less carbon dioxide, and a high temperature. Learn Genetically Modified Organisms Quiz Questions, download Google Book (Free Chapter) for biology distance revision.

Respiration in Biology Exam Questions and Answers PDF Download: Test 7

MCQ 31: In context of respiration, inspired air has:

  1. less oxygen
  2. more water vapors
  3. less carbon dioxide
  4. a high temperature

MCQ 32: Enzymes vital for aerobic respiration (with O2) are found in:

  1. platelets
  2. centriole
  3. nucleus
  4. mitochondria

MCQ 33: Oxidation does not involve:

  1. gain of electrons
  2. addition of oxygen
  3. loss of hydrogen
  4. gain of energy

MCQ 34: Trachea divides into two:

  1. cilia
  2. bronchus
  3. bronchi
  4. pleura

MCQ 35: Number of bronchial tubes, left bronchus gets divided into are:

  1. two
  2. three
  3. depends on age of organism
  4. varies in man

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