Question

according to chargaffs rule, base pairing in dna should resemble which of the following?
○ a = t; c = g
○ a = c; t = g
○ a = g; t = u
○ a = u; c = g

Explanation:

Chargaff's rule states that in DNA, the amount of adenine (A) is equal to the amount of thymine (T), and the amount of cytosine (C) is equal to the amount of guanine (G). This is because A pairs with T via two hydrogen bonds, and C pairs with G via three hydrogen bonds. Uracil (U) is found in RNA, not DNA. So, the correct base - pairing according to Chargaff's rule is \(A = T\) and \(C = G\).

Answer:

A. \(A = T; C = G\)