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

Question

Quizplus · Accepted Answer

If the codon after mutation corresponds to the same amino acid as the original codon, then there would not be any significant effect on the protein structure and function. This is because many amino acids are coded by multiple codons (due to the degeneracy of genetic code) and substitution of one codon with another that codes for the same amino acid would not affect the protein sequence or function.

A Single Base Substitution Mutation Is Likely to Have a Less