DNA Sequencing, Mutation and Repair - Medical Science

Q1:

A nonsense mutation introduced into the DNA sequence of a gene may

A cause premature termination of the mRNA

B shorten the length of the protein encoded by the gene

C have no effect on the transcript or protein made

D cause a shift in reading frame

ANS:B - shorten the length of the protein encoded by the gene

It may be premature termination of mRNA that resultant protein is short.