Biology 9700 · AS & A Level · Mode of action of enzymes

Mode of action of enzymes — practice question

Which row gives the correct description of enzymes that catalyse reactions according to the lock-and-key hypothesis?

  • Alowers the activation energy; changes to become complementary as the enzyme-substrate complex forms
  • Blowers the activation energy; complementary before, during and after the formation of an enzyme-substrate complex
  • Craises the activation energy; changes to become complementary as the enzyme-substrate complex forms
  • Draises the activation energy; complementary before, during and after the formation of an enzyme-substrate complex

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