A-LevelBiologyCell membranes and transport9700/12 · May/June 2019 · Q131 Mark

The diagram shows a cell surface membrane. [Figure: Diagram of cell surface membrane with labelled molecules W, X, Y, Z] Which is a correct role for a labelled molecule?

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AW is involved in controlling membrane stability.

BX is involved in active transport.

CY is involved in cell signalling.

DZ is involved in diffusion of ions.

✓ Correct answer

C: Y is involved in cell signalling.

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Topic: Cell membranes and transport, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2019 Paper 1 Variant 2, question 13.

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