Question

question 4 of 10
what did chargaffs team find during their experiments with dna in different species?

a. the amount of purines was always the same as the amount of pyrimidines.
b. purines always appeared in larger amounts than pyrimidines.
c. the ratio of purines to pyrimidines varied widely among species.
d. multicellular species contained mostly pyrimidines.

Explanation:

Chargaff's rules state that in DNA, the amount of adenine (A, a purine) equals thymine (T, a pyrimidine), and the amount of guanine (G, a purine) equals cytosine (C, a pyrimidine). So, the total amount of purines (A + G) is equal to the total amount of pyrimidines (T + C).

Answer:

A. The amount of purines was always the same as the amount of pyrimidines.