IB Biology SL C1.2.4 Cell Respiration System Questions

Practise IB Biology SL 8.2.4 by explaining how controlled oxidation of organic compounds releases energy for ATP and cell processes.

Exam points

Define cellular respiration as enzyme-controlled, stepwise oxidation of organic compounds that releases energy for ATP production.
Relate aerobic respiration to oxygen use, electron acceptance, carbon dioxide release and ATP generation across respiration stages.
Interpret respiration and metabolite evidence to compare aerobic/anaerobic energy release and identify substrates used by cells.

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Study C1.2.4—Cell respiration system conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

[Maximum number: 2]

Describe cell respiration in terms of metabolism.

a. cell respiration is metabolism because enzymes control the reactions
b. energy is released from complex molecules to make ATP
c. respiration is catabolic (metabolism);
OR complex molecules become simpler;
OR
$\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} \text { to } \mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}$

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IB Biology SL C1.2.4 Cell Respiration System Questions question 1