A-LevelBiologyCell membranes and transport9700/12 · Oct/Nov 2011 · Q161 Mark

The cell surface membranes of plants adapted to cold conditions change as the weather gets colder, allowing the plants to carry out exocytosis. Which change occurs?

Adecrease in the ratio of proteins to saturated phospholipids

Bdecrease in the ratio of unsaturated phospholipids to saturated phospholipids

Can increase in the ratio of proteins to unsaturated phospholipids

Dan increase in the ratio of unsaturated phospholipids to saturated phospholipids

✓ Correct answer

D: an increase in the ratio of unsaturated phospholipids to saturated phospholipids

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Topic: Cell membranes and transport, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2011 Paper 1 Variant 2, question 16.

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