May/June 2026 Paper 11

2026 · 40 questions · 40 parts · 40 marks

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14Enzymes Enzyme KineticsMedium1 mark
Which graph represents the action of a non-competitive inhibitor?
Four small graphs (A to D) of rate of reaction against concentration of substrate, each with a solid curve (without inhibitor) rising to a plateau. In A the dashed curve (with inhibitor) rises to a lower plateau; in B it rises then falls back to zero; in C it is a shallower, roughly straight line below the solid curve; in D it tracks just below the solid curve throughout.