A-LevelBiologyEnzymesFeb/Mar 2023Paper 1 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
The correct answer is B. This question tests the candidate's understanding of enzymes within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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