A Single Base Substitution Mutation Is Likely to Have a Less

Multiple Choice

A single base substitution mutation is likely to have a less harmful effect when the base change results in which of the following?

A) a stop codon
B) a codon that specifies the same amino acid as the original codon
C) an amino acid substitution that alters the tertiary structure of the protein
D) an amino acid substitution at the active site of an enzyme