A bean seedling absorbs magnesium ions from the soil through its root hair cells. The table shows magnesium ion concentrations for four root hair cells and the soil solution next to each cell.
| Condition | Magnesium ion concentration in soil solution in mmol/dm³ | Magnesium ion concentration in root hair cell in mmol/dm³ |
|---|---|---|
| K | 0.4 | 1.6 |
| L | 2.4 | 0.8 |
| M | 1.8 | 1.2 |
| N | 3.0 | 0.5 |
In which condition is energy released by respiration required for magnesium ions to enter the root hair cell?
Condition M
Condition N
Condition K
Condition L
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.