A-LevelBiologyNucleic acids and protein synthesis9700/12 · May/June 2024 · Q211 Mark

The mRNA codons ACU, ACC, ACA and ACG all code for the same amino acid, threonine. Which anticodons could specify an amino acid other than threonine? 1 UCA 2 ACC 3 UGU 4 UGC

A1, 3 and 4

B1 and 2

C2 and 3

D3 and 4 only

✓ Correct answer

B: 1 and 2

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Topic: Nucleic acids and protein synthesis, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2024 Paper 1 Variant 2, question 21.

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