Multiple Choice
Which of the following are ways that mutations may alter a gene?
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15. Gene Expression
Mutations
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How does a single change in a nitrogen base alter the formation of a resulting protein?
A
It can lead to a different amino acid being incorporated into the protein, potentially altering its function.
B
It always results in the complete breakdown of the protein.
C
It has no effect on the protein structure or function.
D
It causes the protein to become longer than originally intended.
Verified step by step guidance1
Understand that DNA is composed of sequences of nitrogen bases (adenine, thymine, cytosine, and guanine) that code for proteins.
Recognize that a change in a single nitrogen base in the DNA sequence is called a point mutation.
Learn that during protein synthesis, DNA is transcribed into mRNA, which is then translated into a sequence of amino acids to form a protein.
Realize that a point mutation can lead to a different codon in the mRNA, which may code for a different amino acid, potentially altering the protein's structure and function.
Consider that not all point mutations result in a change in the protein; some are silent mutations where the altered codon still codes for the same amino acid, having no effect on the protein.
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