O-LevelBiologyCell Biology5090/11 · Oct/Nov 2018 · Q31 Mark
A seedling is placed, with its roots, in a solution containing potassium ions and left for 48 hours. The relative concentrations of the potassium ions are shown in the table. start of experiment concentration of potassium ions in the solution 20 concentration of potassium ions in the root hair 15 after 48 hours 18 35 How did the potassium ions enter the cell?
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Aactive transport ✓, diffusion ✓, osmosis X
Bactive transport ✓, diffusion X, osmosis ✓
Cactive transport ✓, diffusion X, osmosis X
Dactive transport X, diffusion X, osmosis ✓
✓ Correct answer
A: active transport ✓, diffusion ✓, osmosis X
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