A-Level UK (AQA, Edexcel, OCR) · Biology

Enzymes

5 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 5 questions

  1. How does a competitive inhibitor reduce the rate of an enzyme-catalysed reaction?
  2. The rate of an enzyme reaction is 4 units at 20 °C and 12 units at 30 °C. What is the temperature coefficient (Q10)?
  3. Why does the rate of an enzyme reaction level off at high substrate concentration?
  4. Which change is most likely to denature an enzyme in a mammal's cell?
  5. The lock-and-key model has been replaced by the induced-fit model. What does the induced-fit model state?

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