A-LevelBiologyEnzymesOct/Nov 2015Paper 1 Q131 Mark
The diagram shows the mass of product formed over time in three reactions using the same substrate and enzyme. The volumes of substrate, enzyme and temperature were kept constant in each reaction. [Figure 13.1] Which statement explains the difference in these reactions?
AThe pH in reactions 2 and 3 has denatured the enzyme.
BThere is a non-competitive inhibitor present in reaction 3.
CThere is the highest concentration of enzyme in reaction 1.
DThere is the highest concentration of substrate in reaction 1.
✓ Correct Answer
The correct answer is C. 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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