Question

Which is true according to Chargaff's rule?

Options

• A + G = T + C

• A = C

• G = T

• `\frac{A + T}{C + G} = 1`

Answer 1

A + G = T + C

Explanation:

Because A pairs with T and G pairs with C, total purines equal total pyrimidines: A + G = T + C. The ratio of A + T to C + G is not necessarily 1.