A scientist places equal masses of living plant-root tissue in two containers for one hour. The temperature and all other conditions are kept the same.
| Root sample | Oxygen condition | Glucose broken down (μmol) | ATP molecules made per glucose molecule |
|---|---|---|---|
| A | oxygen supplied | 0.30 | 30 |
| B | no oxygen supplied | 1.00 | 2 |
Calculate how many times as much total ATP sample A made as sample B. Explain why sample A made more ATP even though it broke down less glucose.
113 exam-style questions on OCR GCSE Biology 1.3 Respiration, covering 1.3.1 Cellular respiration supplies ATP, 1.3.2 Aerobic and anaerobic respiration, 1.3.3 Sugars and carbohydrates, 1.3.4 Amino acids and proteins, and 1.3.5 Fatty acids and lipids. Each one has a worked solution and a mark scheme showing where the marks go.