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.
When error occurs at DNA replication stage, it will further affect the process of transcription i.e. formation of mRNA and translation i.e. synthesis of protein. This is because DNA molecule serves as the precursor in transcription and if an error gets incorporated in it, it will be carried further.