A-LevelBiologyCell membranes and transport9700/12 · May/June 2015 · Q171 Mark

Which set of factors will produce the most fluid cell surface membrane?

Aan increase in proportion of phospholipids with saturated fatty acid chains, an increase in distance between phospholipid molecules

Ban increase in proportion of long fatty acid chains, an increase in proportion of phospholipids with unsaturated fatty acid chains

Can increase in proportion of long fatty acid chains, an increase in temperature

Dan increase in proportion of phospholipids with unsaturated fatty acid chains, an increase in temperature

✓ Correct answer

D: an increase in proportion of phospholipids with unsaturated fatty acid chains, an increase in temperature

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Topic: Cell membranes and transport, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2015 Paper 1 Variant 2, question 17.

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