A-LevelBiologyEnzymesOct/Nov 2023Paper 1 Q131 Mark
The graph shows the results of two experiments on the effect of increasing substrate concentration on the rate of an enzyme-catalysed reaction. One experiment was at a high concentration of enzyme and the second was at a low concentration of enzyme. All other variables were standardised. [Figure 13.1] What would limit the initial rate of reaction at point X?
Aenzyme concentration
BpH
Csubstrate concentration
Dtemperature
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The correct answer is A. This question tests the candidate's understanding of enzymes within the Biologysyllabus. The examiner's mark scheme requires...
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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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