Multiple Choice
Which genetic change would most likely result in a frameshift mutation within a coding sequence?
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17. Mutation, Repair, and Recombination
Types of Mutations
Multiple Choice
In the context of types of mutations, what is a silent mutation?
A
A mutation that converts a codon into a stop codon, causing premature termination of translation (nonsense mutation).
B
An insertion or deletion that shifts the reading frame of the coding sequence (frameshift mutation).
C
A nucleotide substitution that changes a codon but does not change the encoded amino acid.
D
A mutation that changes a codon so that it encodes a different amino acid (missense mutation).
Verified step by step guidance1
Understand that mutations are changes in the DNA sequence that can affect the protein produced.
Recognize that a silent mutation is a specific type of nucleotide substitution where the codon changes but still codes for the same amino acid due to the redundancy of the genetic code.
Differentiate silent mutations from other types: nonsense mutations introduce a stop codon, frameshift mutations alter the reading frame, and missense mutations change the amino acid.
Recall that because silent mutations do not change the amino acid sequence, they usually do not affect the protein's function.
Conclude that a silent mutation is best defined as a nucleotide substitution that changes a codon but does not change the encoded amino acid.
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