A-LevelBiologyBiological molecules9700/12 · Oct/Nov 2021 · Q121 Mark

The diagram shows an amino acid. [Figure showing a generic amino acid structure] Which group is changed to produce different amino acids?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

AOH

BC=O

CCH3

DNH2

✓ Correct answer

C: CH3

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

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