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?
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. This question tests the candidate's understanding of biological molecules 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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