A-LevelBiologyEnzymes9700/12 · Feb/Mar 2016 · Q121 Mark
The graphs show the effects of temperature and pH on enzyme activity. Which statement is a correct explanation of the enzyme activity? [Figure 12.1]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AAt P, hydrogen bonds are formed between enzyme and substrate.
BAt Q, the kinetic energy of enzyme and substrate is highest.
CAt R, disulfide bonds in the enzyme begin to break.
DAt S, the enzyme is completely denatured.
✓ Correct answer
A: At P, hydrogen bonds are formed between enzyme and substrate.
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