試題詳解

22.A mutant protein has been designated as G189A. What does this designation reveal about the mutation?
(A) That a G nucleotide has been exchanged for an A nucleotide 189 bases from the 5' end of the coding region.
(B) That a glycine in position 189 of the protein is now an alanine.
(C) That an A nucleotide has been exchanged for a G nucleotide 189 bases from the 5' end of the coding region.
(D) That a glycine is now in position 189 of the protein instead of an alanine.
(E) That a nonsense mutation occurred at position 189 of the protein.