O-LevelBiologyPlant Nutrition5090/11 · May/June 2024 · Q41 Mark

The diagram shows the concentration of magnesium ions in a root hair cell of a healthy plant and in the soil water surrounding the root hair cell. The plant continuously uses up magnesium ions. [Figure 4.1] For the plant to remain healthy, how will the magnesium ions move?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Ainto the cell by active transport

Binto the cell by diffusion

Cout of the cell by active transport

Dout of the cell by diffusion

✓ Correct answer

A: into the cell by active transport

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Topic: Plant Nutrition, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2024 Paper 1 Variant 1, question 4.

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