A-LevelBiologyEnzymesFeb/Mar 2019Paper 1 Q161 Mark
The diagram represents the reversible interaction between the active site of an enzyme and different inhibitors, X and Y. [Figure shows an enzyme with an active site, inhibitor X binding to active site, inhibitor Y binding to an allosteric site and changing active site shape] Which row correctly identifies the type of inhibition shown by inhibitor X and inhibitor Y?
AX: competitive, Y: competitive
BX: competitive, Y: non-competitive
CX: non-competitive, Y: competitive
DX: non-competitive, Y: non-competitive
✓ 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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