When Is a Single Base Substitution Mutation Least Likely to Be

question 12

Multiple Choice

When is a single base substitution mutation least likely to be deleterious?

• A) when the base change results in an amino acid substitution at the active site of an enzyme
• B) when the base change results in an amino acid substitution that alters the tertiary structure of the protein
• C) when the single base change results in a stop codon
• D) when the single base change results in a codon that specifies the same amino acid as the original codon

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