What is a point mutation?
a. Mutation of the stop codon
b. Replacement of one nucleotide in the normal gene with a different nucleotide
c. Addition of one nucleotide in the normal gene
d. Deletion of one nucleotide in the normal gene
ANS: B
Replacement of one nucleotide in the normal gene with a different nucleotide is a point mutation. This results in a different amino acid and can affect the protein's function.
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