IGCSE O Level Biology MCQs - Chapter 15

Respiration in Biology Multiple Choice Questions (MCQ) PDF - 10

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Respiration in Biology Questions & Answers PDF Download: MCQ Quiz 10

MCQ 46: Scientifically, breathing is a/an

chemical process
biochemical process
thermal process
redox process

MCQ 47: During anabolic (building up) process the

plant stops respiration
oxygen is used up and carbon dioxide is produced
building up of carbohydrates occur
breakdown of carbohydrates occur

MCQ 48: During oxygen debt, the lactic acid is transferred from muscles to

liver
muscles
lungs
mucus

MCQ 49: Smallest bronchial tubes are called

alveoli
cilia
bronchioles
pleuron

MCQ 50: Hydrogen carbonate ions (HCO₃^-) are carried to

blood plasma
lungs
liver cells
blood capillaries

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