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Biology · May / June 2020 · Paper 11 · Question 4

5090Enzyme action

Which property of enzymes is explained by the lock and key hypothesis?

  1. AAll enzymes are proteins.
  2. BEnzymes are inactive at very low temperatures.
  3. CHuman enzymes are most active just below 40 °C.
  4. DMost enzymes can catalyse only one reaction.

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Correct answer: D. Most enzymes can catalyse only one reaction.

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