A-LevelBiologyBiological molecules9700/12 · Oct/Nov 2019 · Q111 Mark

Fibrous proteins are composed of chains of amino acids held together by bonds. An example of part of a fibrous protein is shown. [Figure 11.1]

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AX: disulfide, Y: hydrophobic interaction

BX: hydrogen, Y: peptide

CX: hydrophobic interaction, Y: ionic

DX: ionic, Y: peptide

✓ Correct answer

B: X: hydrogen, Y: peptide

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Topic: Biological molecules, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2019 Paper 1 Variant 2, question 11.

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