Question

question 22
2 points
what type of mutation alters the base but not the amino acid being coded for?
a silent
b missense
c nonsense
d back
e point

Explanation:

A silent mutation changes a nucleotide base in DNA but does not change the amino acid encoded by the codon, due to the degeneracy of the genetic code (multiple codons can code for the same amino acid). Other options: missense changes the amino acid, nonsense introduces a stop codon, back reverses a prior mutation, and point is a general category of single-base mutations (not specific to no amino acid change).

Answer:

A. Silent