May/June 2026 Paper 23

2026 · 40 questions · 40 parts · 40 marks

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8Enzymes Enzyme KineticsMedium1 mark
The diagram shows the effect of temperature on the rate of an enzyme reaction.
Graph of rate of reaction against temperature: the rate rises slowly, then steeply to a peak, and falls sharply to zero; arrows on the temperature axis mark P at the start of the curve, Q on the rising part, R at the peak and S where the rate reaches zero
Which statement is correct?