Which of the following ratios of nucleotides is constant for DNA?
A) A + G = T + C
B) A + T = G + C
C) A + C = U + G
D) A + U = G + C

Question

Quizplus · Accepted Answer

A + G = T + C is a constant ratio for DNA because it reflects the base pairing rules of DNA. Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C). This means that the number of A nucleotides in a DNA molecule will always be equal to the number of T nucleotides, and the number of G nucleotides will always be equal to the number of C nucleotides.

Which of the Following Ratios of Nucleotides Is Constant for DNA