A-LevelBiologyBiological moleculesMay/June 2018Paper 1 Q111 Mark
Which row describes a collagen molecule?
Abonds stabilising the molecule disulfide, properties high temperatures increase flexibility, primary structure high proportion of glycine, helix double
Bbonds stabilising the molecule disulfide, properties resistant to stretching, primary structure repeat sequences of three amino acids, helix single
Cbonds stabilising the molecule hydrogen, properties high tensile strength, primary structure repeat sequences of three amino acids, helix triple
Dbonds stabilising the molecule hydrogen, properties insoluble in water, primary structure high proportion of glycine and proline, helix alpha
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of biological molecules within the Biologysyllabus. The examiner's mark scheme requires...
📋 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...
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