A-LevelBiologyNucleic acids and protein synthesis9700/12 · Feb/Mar 2019 · Q211 Mark

A length of DNA was analysed and sequenced. 24% of its nitrogenous bases were adenine. Which percentage of the bases will be cytosine?

A24

B26

C48

D76

✓ Correct answer

B: 26

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Topic: Nucleic acids and protein synthesis, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Feb/Mar 2019 Paper 1 Variant 2, question 21.

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