Describe5 marksStandard
Describe how enzymes catalyse reactions. In your answer, you should refer to:
- the effect on activation energy
- the formation of an enzyme-substrate complex
- the lock-and-key and induced-fit hypotheses for enzyme specificity
CAIE A Level Biology 9700 · Enzymes
Enzymes: describe question
How this question is marked
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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