Question

A mutation of a C to a G in the sequence of a gene causes a change from a threonine to a serine in the polypeptide resulting from the expression of this locus. This mutation, therefore, occurred in an exon. true or false?

Answer 1

The mutation from a C to a G that changes an amino acid from threonine to serine in the protein must have occurred in an exon, as exons are the coding sequences that determine the amino acid sequence in proteins. This is a missense mutation.

Step-by-step explanation:

The student's question asks whether a mutation from a C to a G that results in an amino acid change from threonine to serine occurred in an exon. The answer is true. This type of mutation is known as a missense mutation, where a single nucleotide change leads to the substitution of one amino acid for another in the resulting polypeptide. Since amino acid changes occur as a result of alterations in the coding sequence of a gene, and exons are the coding regions that are translated into protein, the mutation must have occurred in an exon. Mutations in introns do not usually affect the amino acid sequence of the encoded protein because introns are non-coding regions and are removed during RNA splicing before translation.

Answer 2

The answer for this is True