A scientist placed equal masses of living leaf cells and living root cells from the same plant into separate sealed containers of solution. The solution contained dissolved carbon dioxide. Both containers were kept in bright light at the same temperature for two hours.
| Cell sample | Chlorophyll content in mg per g of cells | Dissolved oxygen at the start in mg dm⁻³ | Dissolved oxygen after two hours in mg dm⁻³ |
|---|---|---|---|
| Leaf cells | 1.8 | 8.2 | 11.6 |
| Root cells | 0.0 | 8.2 | 7.5 |
Explain which cell sample made glucose by photosynthesis and why the dissolved oxygen concentration changed in each container.
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.