A Mutation Has Occurred During DNA Replication While the Cell

question 84

Multiple Choice

A mutation has occurred during DNA replication while the cell was preparing to divide.As a result of this, the codon ACU of mRNA has now become ACC.Interestingly, there is no change to the protein being made.Why not?

• A)This is a silent mutation.
• B)The original amino acid isoleucine was changed to leucine, but they are the same variation of amino acid so no change to the protein.
• C)The mutation was fixed, and even though the codon is now ACC the correct amino acid is put into place for the normal protein.
• D)This is not a mutation that causes a big change, so there is no change to the protein being made.

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