A-LevelBiologyBiological molecules9700/12 · Feb/Mar 2021 · Q121 Mark

Which statement about collagen is correct?

ATissues containing collagen fibres cannot stretch.

BEach polypeptide chain forms an alpha helix.

CThree helices are held together by hydrogen bonds.

DThree polypeptide chains form a single collagen fibre.

✓ Correct answer

C: Three helices are held together by hydrogen bonds.

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Topic: Biological molecules, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Feb/Mar 2021 Paper 1 Variant 2, question 12.

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