A-LevelBiologyEnzymesMay/June 2017Paper 1 Q111 Mark
The following statements are about enzymes. 1 Folding of an enzyme molecule causes the formation of the active site. 2 The shape of the active site changes to enable the substrate to bind. 3 Temporary bonds hold the substrate in the active site. 4 More enzyme-substrate complexes are formed at the optimum temperature. Which statements are correct for the induced fit hypothesis?
A1 and 2
B1 and 3
C2, 3 and 4
D2 and 4 only
✓ Correct Answer
The correct answer is C: 2, 3 and 4
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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