What is the Effect of a Nonsense Mutation in a Gene

Question

What is the effect of a nonsense mutation in a gene?
A)It changes an amino acid in the encoded protein.
B)It has no effect on the amino acid sequence of the encoded protein.
C)It introduces a premature stop codon into the mRNA.
D)It alters the reading frame of the mRNA.
E)It prevents introns from being excised.

Accepted Answer

A nonsense mutation introduces a premature stop codon into the mRNA, resulting in a truncated protein that is likely non-functional. This is because the stop codon signals the end of translation, preventing the ribosome from synthesizing the entire protein.