A point mutation alters
A) a single base.
B) 3 bases.
C) a chromosome tip.
D) a centromere.
E) only a purine.

Question

Quizplus · Accepted Answer

A point mutation is a change in a single nucleotide in DNA. It can involve the substitution of one nucleotide for another, the addition or deletion of a nucleotide, or the rearrangement of nucleotides within the DNA sequence. Therefore, the best choice is A, which indicates that a single base is altered.

A Point Mutation Alters