Which of the following is/are consequence(s) of nitrous acid (HNO2_22) mediated deamination?
Which of the following is/are consequence(s) of nitrous acid (HNO2_2) mediated deamination?
(A) Deamination of cytosine, adenine, and guanine
(B) GC-to-AT transitions
(C) AT-to-GC transitions
(D) Addition of an alkyl group to the bases
Answer
Answer: (A) Deamination of cytosine, adenine, and guanine
(B) GC-to-AT transitions
(C) AT-to-GC transitions
Explanation:
Nitrous acid causes the deamination of cytosine, adenine, and guanine, leading to transitions from GC to AT and AT to GC in DNA.