CAIE A Level Biology 9700 · Energy and respiration
During aerobic respiration, the inner mitochondrial membrane plays a crucial role in ATP synthesis. Outline the process of oxidative phosphorylation, with particular reference to the movement of protons across the inner mitochondrial membrane and how this leads to the production of ATP.
5 marks, so the mark scheme is looking for about 5 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.