A scientist analysed living rice root cells from waterlogged soil.
| Measurement | At the start | After 6 hours |
|---|---|---|
| Glucose in the cells in mg per g | 12.0 | 8.5 |
| Ethanol in the cells in mg per g | 0.0 | 1.4 |
| Carbon dioxide released in cm³ | 0.0 | 3.2 |
What do these changes show about the chemical energy that was initially held in glucose?
Most of this chemical energy became stored in the carbon dioxide.
Some of this chemical energy remained stored in the ethanol.
None of this chemical energy was transferred, because no oxygen was used.
All of this chemical energy was transferred to ATP in the cells.
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.