The fact that for a given species the amount of purines in the DNA always matches the number of pyrimidines was first determined by
A) Watson and Crick.
B) Franklin and Wilkins.
C) Hershey and Chase.
D) Chargaff.
E) Mendel.

Question

Quizplus · Accepted Answer

The discovery that the amount of purines (adenine and guanine) always equals the amount of pyrimidines (thymine and cytosine) in DNA was first made by Erwin Chargaff in the late 1940s.

The Fact That for a Given Species the Amount of Purines