In a protein-coding region of DNA, a mutation that replaces a single nucleotide, but does not change the resulting amino acid, is likely to be:
A)at the 5' position in a codon of the transcribed mRNA.
B)at the middle position in a codon of the transcribed mRNA.
C)at the 3' position in a codon of the transcribed mRNA.
D)at any position in a codon of the transcribed mRNA.
E)None of the other answer options is correct.

Question

Quizplus · Accepted Answer

This type of mutation is known as a synonymous or silent mutation, and it often occurs at the 3' position in a codon of the transcribed mRNA due to the degeneracy of the genetic code, where multiple codons can encode for the same amino acid.

In a Protein-Coding Region of DNA, a Mutation That Replaces