O-LevelBiologyCell Biology5090/12 · May/June 2016 · Q21 Mark

Which processes can only occur through a membrane? [Figure showing a table with active transport, diffusion, osmosis, and a key for yes/no]

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Aactive transport: ✓, diffusion: ✓, osmosis: X

Bactive transport: ✓, diffusion: X, osmosis: ✓

Cactive transport: X, diffusion: ✓, osmosis: ✓

Dactive transport: X, diffusion: X, osmosis: ✓

✓ Correct answer

C: active transport: X, diffusion: ✓, osmosis: ✓

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Topic: Cell Biology, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2016 Paper 1 Variant 2, question 2.

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