In an analysis of the nucleotide composition of a molecule of DNA, which of the following combinations of base pairs will be found?
A) A = C
B) A = G and C = T
C) A + C = G + T
D) G + C = T + A

Question

Quizplus · Accepted Answer

According to Chargaff's rules, in DNA, the amount of adenine (A) equals thymine (T), and the amount of cytosine (C) equals guanine (G). Therefore, the sum of purines (A + G) equals the sum of pyrimidines (C + T), which can be rearranged to A + C = G + T.

In an Analysis of the Nucleotide Composition of a Molecule