Which one of the following statements is true for protein s…

Chemistry Biomolecules HARD Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

Which one of the following statements is true for protein synthesis (translation)

Amino acid are directly recognized by m -RNA

The third base of the codon is less specific

Only one codon codes for an amino acid

Every t -RNA molecule has more than one amino acid attachment

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The correct answer is:

Genetic code shows degeneracy i.e., occurrence of more than 1 codon per amino acid. All the amino acids except methionine and tryptophan are coded by more than 1 codon.

For example, valine is specified by GUU, GUC, GUA, GUG.
This shows that first two bases are common in all the four codons coding for valine. But the third base can be changed.

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