A-LevelBiologyEnzymesMay/June 2017Paper 1 Q121 Mark
How is the Michaelis-Menten constant (Km) used?
Ato assess the efficiency of an enzyme in catalysing a reaction
Bto compare the affinity of enzymes for their substrate
Cto find the maximum velocity of an enzyme (Vmax)
Dto find the rate at which substrate is loaded by an enzyme
✓ 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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