CAIE A Level Biology 9700 · Energy and respiration
Mitochondria are the site of aerobic respiration. A student supplies isolated mitochondria with pyruvate and observes oxygen consumption. Outline the link reaction and oxidative phosphorylation, stating where each occurs, the main molecules involved, and how the structure of the inner mitochondrial membrane facilitates ATP production.
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.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.