True statement regarding base excision repair is: (A) Used only for the bases which are deaminated, (B) Uses enzyme called as DNA glycosylase which generates a basic sugar site, (C) Removes about 10 - 15 nucleotide, (D) Recognizes a bulk lesion
Answer is B. This is the first step of base excision repair. Bases modified by deamination, methylation, or by other chemical modification are removed by this kind of repair system.