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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Definitions:

Stratified Squamous Epithelium

A type of protective tissue consisting of layers of flat cells found in areas such as the skin, mouth, and esophagus.

Simple Columnar Epithelium

A type of epithelium consisting of a single layer of tall, closely packed cells, which line organs such as the stomach and intestines.

Transitional Epithelium

Transitional epithelium is a type of tissue found lining organs that can stretch, such as the bladder; it allows for expansion and retraction without tearing.

Transitional Epithelium

A type of epithelial tissue characterized by its ability to stretch and change shape, found lining organs such as the bladder.