Biology 9700 · AS & A Level · Protein synthesis

Protein synthesis — practice question

A messenger RNA (mRNA) molecule was formed during gene transcription. The DNA template sequence was ATGC. Fig. 3.1 illustrates the section of messenger RNA that corresponds to that four-base sequence.
(a)[4]

Name the four labelled parts, D, E, F and G, of the mRNA molecule in Fig. 3.1.

(b)[3]

Complete the table to show three differences between mRNA and DNA.

(c)[4]

Describe the role of mRNA after it has left the nucleus and entered the cytoplasm of a eukaryotic cell.

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This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “D is uracil” …

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