A scientist breaks open plant cells and separates the sub-cellular structures into three samples. One sample contains chloroplasts.
Equal quantities of each sample are placed in the same solution, which contains dissolved carbon dioxide, oxygen and glucose. The samples are kept in bright light for 30 minutes.
| Sample | Change in mass of glucose in mg | Change in volume of oxygen in cm³ |
|---|---|---|
| P | −0.18 | −0.14 |
| Q | +0.25 | +0.20 |
| R | 0.00 | 0.00 |
In which sample are chloroplasts present? Use the data to explain your answer.
68 exam-style questions on AQA GCSE Biology 4.1 Photosynthesis, covering 4.1.1 Photosynthetic reaction, 4.1.2 Rate of photosynthesis, and 4.1.3 Uses of glucose from photosynthesis. Each one has a worked solution and a mark scheme showing where the marks go.