A-LevelBiologyEnzymes9700/12 · Feb/Mar 2023 · Q151 Mark
Which row is correct for enzymes that catalyse reactions using 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
✓ Correct answer
B: lowers the activation energy; complementary before, during and after the formation of an enzyme–substrate complex
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