A sample of potato tuber cells breaks down 60 glucose molecules during a period when the oxygen supply is limited. The cells respire some of the glucose aerobically and the rest anaerobically, producing a total yield of 540 ATP molecules.
For this calculation, assume that aerobic respiration yields 30 ATP molecules per glucose molecule and anaerobic respiration yields 2 ATP molecules per glucose molecule.
How many of the glucose molecules are respired aerobically?
14 glucose molecules
18 glucose molecules
15 glucose molecules
45 glucose molecules
98 exam-style questions on Edexcel GCSE Biology 8.3 Respiration, covering 8.3.1 Aerobic and anaerobic respiration. Each one has a worked solution and a mark scheme showing where the marks go.