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A-LevelBiologyEnzymesMay/June 2024Paper 2 Q36 Marks

Lysozyme is an antibacterial enzyme that was discovered in 1921 by Alexander Fleming, the scientist who discovered penicillin. Lysozyme catalyses the hydrolysis of glycosidic bonds present in peptidoglycan molecules to form smaller products, NAG (N-acetylglucosamine) and NAM (N-acetylmuramic acid).

Q: What topic does this question test?

This question tests Enzymes in A-Level Biology (syllabus code 9700). It is worth 6 marks.

📋 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.

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About This A-Level Biology Question

Topic

This structured question tests Enzymes in A-Level Biology (syllabus code 9700). It is worth 6 marks.

Source

This question appeared in the Cambridge A-Level Biology May/June 2024 examination, Paper 2 Variant 2.

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