Q. Which of the following best describes a frameshift mutation?
A.A mutation that changes one amino acid
B.A mutation that adds or removes nucleotides, altering the reading frame
C.A mutation that duplicates a segment of DNA
D.A mutation that occurs in non-coding regions
Solution
A frameshift mutation occurs when nucleotides are added or removed from the DNA sequence, shifting the reading frame and altering the resulting protein.
Correct Answer: B — A mutation that adds or removes nucleotides, altering the reading frame
