Which row correctly describes the primary structure, secondary structure, tertiary structure and quaternary structure of some proteins? [Figure 15.1]
✓ Correct Answer
The correct answer is C: primary structure involves covalent bonds only secondary structure involves interactions between –H and =O tertiary structure essential for the function of enzymes and receptors quaternary structure formed when two or more polypeptides join together
📋 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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