A-LevelBiologyBiological molecules9700/12 · May/June 2010 · Q311 Mark

As a frozen lake warms after a cold winter, mineral nutrients are brought to the surface. Which properties of water contribute to this process? 1 Its greatest density is at 4 °C. 2 It has high specific heat capacity. 3 It is a solvent. 4 Its molecules form hydrogen bonds.

A1 and 3 only

B1 and 4 only

C2 and 3 only

D2 and 4 only

✓ Correct answer

A: 1 and 3 only

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Topic: Biological molecules, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2010 Paper 1 Variant 2, question 31.

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