May/June 2026 Paper 21

2026 · 40 questions · 40 parts · 40 marks

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8Enzymes Enzyme KineticsMedium1 mark
The enzyme-catalysed reaction of substrate S occurs as shown. Which graph shows this enzyme-catalysed reaction?
Four graphs labelled A to D: A total mass of substrate S at start / g against time / min, rising and levelling off at about 29; B total mass of product T at end / g against total mass of substrate S at start / g, a straight line from 0 to 14 at 8 g; C the same axes, a straight line from 0 to 3.6 at 8 g; D rate of reaction / g per min against time / min, rising and levelling off at about 29