(a)[2]
ATP is made from ADP and $\text{P}_i$ in a phosphorylation reaction. State the two different ways that this phosphorylation reaction takes place in aerobic respiration.
(b)[6]
Coenzymes have important roles in all four stages of aerobic respiration. Describe and explain the roles of the coenzymes NAD and FAD in aerobic respiration.
(c)[2]
The enzyme pyruvate dehydrogenase catalyses the link reaction. Pyruvate dehydrogenase is inhibited when the ratio of acetyl coenzyme A to coenzyme A rises. Suggest why this inhibition is important for the functioning of the cell.