A disease reduces the number of working mitochondria in the root hair cells of a plant.
The table shows nitrate ion concentrations around and inside an unaffected root hair cell.
| Location | Nitrate ion concentration in mmol per dm³ |
|---|---|
| Solution surrounding the root | 0.20 |
| Inside the root hair cell | 4.0 |
Explain why plants affected by the disease are likely to grow more slowly than unaffected plants.
140 exam-style questions on AQA GCSE Biology 1.3 Transport in cells, covering 1.3.1 Diffusion, 1.3.2 Osmosis, and 1.3.3 Active transport. Each one has a worked solution and a mark scheme showing where the marks go.