A mutation occurs in DNA resulting in synthesis of a truncated peptide (the trun

ID: 40644 • Letter: A

Question

A mutation occurs in DNA resulting in synthesis of a truncated peptide (the truncated peptide is NH2-met-phe-COOH instead of NH2-met-phe-trp-lysCOOH). What is the most likely cause of this mutation?

a.)

a mutation occurred in the gene encoding the peptide, changing one of the internal codons to TAG

a mutation occurred in the origin for the gene encoding the peptide, which prevented translation from starting at the right nucleotide

a mutation occurred in the promoter for the gene encoding this peptide causing RNA polymerase to terminate transcription prematurely

a mutation occurred in the gene encoding one of the ribosomal proteins causing the ribosome to terminate translation early

a mutation occurred in the gene encoding the peptide, changing the sequence on the template strand of the gene to TAG

a mutation occurred in the gene encoding the peptide, changing one of the internal codons to TAG

b.)

a mutation occurred in the origin for the gene encoding the peptide, which prevented translation from starting at the right nucleotide

c.)

a mutation occurred in the promoter for the gene encoding this peptide causing RNA polymerase to terminate transcription prematurely

d.)

a mutation occurred in the gene encoding one of the ribosomal proteins causing the ribosome to terminate translation early

e.)

a mutation occurred in the gene encoding the peptide, changing the sequence on the template strand of the gene to TAG

Explanation / Answer

d. option is correct

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A mutation occurs in DNA resulting in synthesis of a truncated peptide (the trun

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