A-LevelBiologyEnzymesMay/June 2024Paper 1 Q111 Mark
The graph shows the effect of substrate concentration on the rates of reaction of three enzymes, X, Y, and Z. [Graph showing rate of reaction vs substrate concentration for enzymes X, Y, Z] What is the correct order of affinity of these enzymes for their substrates, starting with the enzyme with the highest affinity?
AX → Y → Z
BX → Z → Y
CY → X → Z
DZ → X → Y
✓ 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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