Multiple Choice
Which of the following is an example of a beneficial mutation?
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15. Gene Expression
Mutations
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A mutation occurs in a sequence of DNA. How could the DNA mutation affect the protein produced?
A
It could change the amino acid sequence, potentially altering the protein's function.
B
It could have no effect on the protein if the mutation is silent.
C
It could prevent the protein from being produced entirely.
D
It could increase the protein's production rate without changing its structure.
Verified step by step guidance1
Understand that DNA mutations can alter the nucleotide sequence, which may affect the mRNA transcribed from the DNA.
Recognize that changes in mRNA can lead to different codons being read during translation, potentially altering the amino acid sequence of the protein.
Consider that if the mutation results in a codon that codes for the same amino acid (a silent mutation), the protein's structure and function may remain unchanged.
Acknowledge that a mutation could introduce a premature stop codon, leading to a truncated protein that may be nonfunctional or degraded.
Realize that mutations in regulatory regions of DNA could affect the rate of transcription, potentially increasing or decreasing the amount of protein produced without altering its structure.
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