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1 December, 03:52

A certain gene in a bacterium codes for a polypeptide that is 120 amino acids long. How many nucleotides are needed in the mRNA to code for this polypeptide?

A. 30

B. 40

C. 360

D. 480

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Answers (1)
  1. 1 December, 07:44
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    The answer is C. 360.

    3 nucleotides correspond to 1 amino acid (this is an important fact to remember). Therefore, to create a polypeptide 120 amino acids long, the mRNA "message" would need to be 3 times that length, or 360 nucleotides.
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