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A-LevelBiologyEnzymes9700/12 · May/June 2017 · Q121 Mark

How is the Michaelis-Menten constant (Km) used?

Ato assess the efficiency of an enzyme in catalysing a reaction

Bto compare the affinity of enzymes for their substrate

Cto find the maximum velocity of an enzyme (Vmax)

Dto find the rate at which substrate is loaded by an enzyme

✓ Correct answer

B: to compare the affinity of enzymes for their substrate

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About this question

Topic: Enzymes, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2017 Paper 1 Variant 2, question 12.

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