During translation, a polypeptide is synthesised when amino acids are added to a growing chain of amino acids.
Fig. 1.1 shows part of a growing chain of amino acids and the amino acid cysteine.
[Figure 1.1]
Fig. 1.2 is a ribbon diagram showing the three-dimensional structure of a protein from the bacterium Streptococcus.
[Figure 1.2]

Q: What topic does this question test?

This question tests Nucleic acids and protein synthesis in A-Level Biology (syllabus code 9700). It is worth 12 marks.

Q: Which exam paper is this question from?

This question appeared in the Cambridge A-Level Biology Oct/Nov 2022 examination, Paper 2 Variant 3 (9700_w22_qp_23.pdf).

Question

During translation, a polypeptide is synthesised when amino acids are added to a growing chain of amino acids.
Fig. 1.1 shows part of a growing chain of amino acids and the amino acid cysteine.
[Figure 1.1]
Fig. 1.2 is a ribbon diagram showing the three-dimensional structure of a protein from the bacterium Streptococcus.
[Figure 1.2]

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