Question

In an analysis of the number of different bases in a DNA sample, which result would be consistent with the base pairing rules?

विकल्प

• A = G

• A = C

• A + G = C + T

• A + T = G + C

Answer 1

A + G = C + T

Explanation:

This relationship is based on Chargaff's Rules, which state that in double-stranded DNA, the total amount of purines always equals the total amount of pyrimidines. Because Adenine (A) specifically pairs with Thymine (T) and Guanine (G) specifically pairs with Cytosine (C), it follows that A = T and G = C. By adding these two equations together, we get A + G = T + C, meaning the sum of adenine and guanine will always equal the sum of thymine and cytosine. The other options are incorrect because the amounts of A and G (or A and C) are not necessarily equal, nor is the sum of A + T required to equal G + C.