A-LevelBiologyEnzymesOct/Nov 2025Paper 1 Q131 Mark
What is the effect of an enzyme in an enzyme-catalysed reaction?
Adecreases the activation energy and decreases the energy yield
Bdecreases the activation energy and has no effect on the energy yield
Cincreases the activation energy and increases the energy yield
Ddecreases the activation energy and increases the energy yield
✓ 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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