A-LevelBiologyBiological moleculesOct/Nov 2025Paper 1 Q81 Mark

The diagram shows a triglyceride molecule. [Diagram of a triglyceride molecule] Which statement is correct for the structure and function of this triglyceride?

Q: What topic does this question test?

This question tests Biological molecules in A-Level Biology (syllabus code 9700). It is worth 1 mark.

AThe glycerol head forms hydrogen bonds with water in cytoplasm to produce oil droplets.

BThe hydrophobic fatty acids allow only small molecules to pass through the cell surface membrane.

CIt packs closely with identical triglyceride molecules to form energy reserves in lysosomes.

DIt has long hydrocarbon chains that release high energy output per unit mass when oxidised.

✓ Correct Answer

The correct answer is D: It has long hydrocarbon chains that release high energy output per unit mass when oxidised.

📋 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 multiple-choice question tests Biological molecules in A-Level Biology (syllabus code 9700). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Biology Oct/Nov 2025 examination, Paper 1 Variant 2.

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