A scientist compares respiration in two cell samples. The table shows results for equal time periods.
Table
| Sample | Number of glucose molecules broken down | Usable energy released in arbitrary units |
|---|---|---|
| P | 40 | 1200 |
| Q | 100 | 200 |
How many times greater is the energy released per glucose molecule in P than in Q?
15 times
2.5 times
6 times
30 times
42 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.