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A-LevelBiologyBiological molecules9700/12 · May/June 2022 · Q91 Mark

The diagram shows two amino acids. Some of the hydrogen atoms are numbered 1 to 6. [Figure showing two amino acid structures with H atoms numbered 1-6] Which two numbered hydrogen atoms could contribute to the production of a molecule of water when a peptide bond forms between these two amino acids?

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A1 and 4
B1 and 6
C3 and 5
D2 and 4

✓ Correct answer

B: 1 and 6

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About this question

Topic
Biological molecules, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source
A-Level Biology, May/June 2022 Paper 1 Variant 2, question 9.

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