A-LevelBiologyEnzymesMay/June 2013Paper 1 Q151 Mark
When investigating the rate of reaction of the enzyme lipase on the hydrolysis of triglycerides, the pH must be maintained at an optimum to prevent the lipase denaturing. What is the reason for this?
AThe addition of water molecules produced by hydrolysis increases pH.
BThe products of hydrolysis decrease the pH.
CThe products of hydrolysis increase the pH.
DThe removal of water molecules used in hydrolysis decreases pH.
✓ Correct Answer
The correct answer is B: The products of hydrolysis decrease the pH.
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
🔒
Unlock the Examiner's Analysis
Sign up for free to reveal the full examiner report, trap analysis, and mark scheme breakdown for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep