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A-LevelBiologyNucleic acids and protein synthesis9700/12 · Oct/Nov 2020 · Q201 Mark

How many hydrogen bonds are holding the two strands of this section of a DNA molecule together? [Figure 20.1]

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.

A16
B32
C38
D48

✓ Correct answer

C: 38

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Topic
Nucleic acids and protein synthesis, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source
A-Level Biology, Oct/Nov 2020 Paper 1 Variant 2, question 20.

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