Imagine an error occurring during DNA replication in a cell, so that where there is supposed to be a T in one of the genes there is instead a G. What effect will this probably have on the cell?
(a) The amino acid sequence of one of its kinds of proteins will be completely changed
(b) An amino acid will be missing from each of its kinds of proteins
(c) One of its kinds of proteins might contain an incorrect amino acid
(d) An amino acid will be missing from one of its kinds of proteins.