A mutation during DNA replication causes a G to be inserted after the first base of the codon for tryptophan. How will this affect the growing polypeptide chain?
A) It will not be affected.
B) There will be a single amino acid substitution.
C) Elongation will stop prematurely.
D) The reading frame will be shifted to the left, and the wrong amino acids will be added from this point on.
E) An extra amino acid will be added, but the reading frame will not be affected.

Question

Quizplus · Accepted Answer

The insertion of a nucleotide causes a frameshift mutation, altering the reading frame and leading to incorrect amino acids being added from the point of mutation onward.

A Mutation During DNA Replication Causes a G to Be