CAIE A Level Biology 9700 · Energy and respiration

Energy and respiration: outline question

Outline7 marksChallenge

During intense exercise, muscle cells may respire anaerobically. Outline the process of anaerobic respiration in mammalian muscle cells and compare its ATP yield per molecule of glucose with that of aerobic respiration. Explain why the yields differ.

How this question is marked

7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.

Outline means: Give the main points briefly. Less detail than describe, but every key step has to be there. One short line per step, in order. The marks are for coverage, not depth.

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