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A-LevelBiologyNucleic acids and protein synthesis9700/12 · May/June 2017 · Q201 Mark

Electron micrographs may show large numbers of ribosomes forming chains along mRNA molecules. What is the advantage of this arrangement, compared to when ribosomes appear singly on the mRNA?

ADifferent polypeptides can be produced simultaneously.
BFewer tRNA molecules are required to translate the polypeptide.
CLarge polypeptide chains can be produced.
DPolypeptides can be produced more rapidly.

✓ Correct answer

D: Polypeptides can be produced more rapidly.

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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 2017 Paper 1 Variant 2, question 20.

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