IGCSE O Level Biology MCQs – Practice Test 8 (Chapter 15)

Respiration in Biology Notes Questions and Answers PDF – Test 8

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Study Respiration in Biology Notes Questios and Answers PDF to master biology fundamentals. Download the Respiration in Biology Quiz Answers PDF e-Book, Ch. 15-8 to study IGCSE O Level Biology Course. Solve Oxygen Debt MCQs, Respiration in Biology quiz answers PDF to master biology fundamentals. Download the Respiration in Biology App: Free IGCSE O Level Biology Notes App to learn human respiration, tissue respiration, gas exchange and breathing career test to achieve educational advancement.

Free Respiration in Biology Notes App Download: Composition of oxygen (O₂) in inspired air is approx.; MCQ with answers: 0.165, 0.21, 0.78, and 0.9. Practice Introduction to Biology Quiz Questions, download Kobo e-Book (Free Chapter) to master biology fundamentals.

Respiration in Biology Notes Q&A PDF Download – Practice Test 8

MCQ 36: In order to recover the fatigue, the lactic acid is:

taken to muscles
taken away from muscles
converted to galactose
converted to glucose

MCQ 37: Composition of oxygen (O₂) in inspired air is approx.:

0.21
0.165
0.78
0.9

MCQ 38: External Nares are connected to internal Nares through:

larynx
mucus
pharynx
nasal passage

MCQ 39: Breathing occurs due to:

chemical process
muscular contractions and movements of ribs
oxidation of organic molecules to release energy and water
physical process

MCQ 40: In respiration oxygen debt refers to the amount of:

oxygen required for oxidation
oxygen lent to other muscles
oxygen required to oxidize lactic acid
oxygen required in rigorous running and physical activities

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