CAIE A Level Biology 9700 · Energy and respiration
The table shows the four stages of aerobic respiration and where each takes place within a cell.
| Stage | Location |
|---|---|
| Glycolysis | Cytoplasm |
| Link reaction | Mitochondrial matrix |
| Krebs cycle | Mitochondrial matrix |
| Oxidative phosphorylation | Inner mitochondrial membrane |
Explain why each stage occurs in its specific location, with reference to the structure and function of the parts of the cell involved.
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.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.