IGCSE O Level Biology MCQs – Practice Test for Exam Prep

What is Respiration Multiple Choice Questions with Answers – PDF Download

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Learn What is Respiration Multiple Choice Questions (MCQ Quiz) with Answers PDF to develop biological sciences. Download the What is Respiration MCQ PDF e-Book to learn IGCSE O Level Biology Tests. Study Respiration in Biology Multiple Choice Questions and Answers (MCQs), What is Respiration quiz answers PDF to enhance academic learning. Download the What is Respiration MCQ App: Free IGCSE O Level Biology Study App to learn school level biology, human respiration, what is respiration, aerobic respiration and its waste test prep for online biology classrooms.

Free "What is Respiration MCQ" App Download: Air pressure in thorax increases in; MCQ with answers: anaerobic respiration, inspiration, expiration, and digestion. Practice What is Respiration Quiz Questions, download Apple Book (Free Chapter) to develop biological sciences.

What is Respiration MCQs PDF Download – Prep Test

MCQ 1: Air pressure in thorax increases in:

anaerobic respiration
inspiration
expiration
digestion

MCQ 2: Blood entering the lungs contain very:

little oxygen (O₂) only
high carbon dioxide (CO₂) only
low carbon dioxide (CO₂)
little oxygen (O₂) and high carbon dioxide (CO₂)

MCQ 3: In expiration in process of respiration:

the diaphragm relaxes and arches upwards
air enters the lungs
ribs move upwards
sternum moves up and away from backbone

MCQ 4: Stimulus for breathing is:

lack of oxygen in blood
excess of carbon dioxide in blood
contraction of alveoli
diaphragm movements

MCQ 5: In anaerobic respiration (without O₂) in mammals, the wastes are:

water
ethanol
lactic acid
carbon dioxide

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