O Level Courses

Chapter 15: IGCSE O Level Biology Exam Tests

IGCSE O Level Biology MCQs - Chapter 15

Respiration in Biology Multiple Choice Questions (MCQ) PDF - 8

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Respiration in Biology Questions & Answers PDF Download: MCQ Quiz 8

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

A) taken to muscles
B) taken away from muscles
C) converted to galactose
D) converted to glucose

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

A) 0.21
B) 0.165
C) 0.78
D) 0.9

MCQ 38: External Nares are connected to internal Nares through

A) larynx
B) mucus
C) pharynx
D) nasal passage

MCQ 39: Breathing occurs due to

A) chemical process
B) muscular contractions and movements of ribs
C) oxidation of organic molecules to release energy and water
D) physical process

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

A) oxygen required for oxidation
B) oxygen lent to other muscles
C) oxygen required to oxidize lactic acid
D) oxygen required in rigorous running and physical activities

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Respiration in Biology App (Android & iOS)

Respiration in Biology App (Android & iOS)

O Level Biology App (Android & iOS)

O Level Biology App (Android & iOS)

MCAT Biology App (Android & iOS)

MCAT Biology App (Android & iOS)

College Biology App (Android & iOS)

College Biology App (Android & iOS)