Question

Determined that the amounts of nitrogenous bases were always found in proportions where A=T and C=G

a) Frederick Griffith
b) Erwin Chargaff
c) James Watson
d) Rosalind Franklin

Answer 1

Erwin Chargaff discovered that DNA bases were always found in proportions where A=T and C=G, also known as Chargaff's rules.

Step-by-step explanation:

The subject of this question is Biology, specifically related to DNA structure and the discovery of Chargaff's rules.

In the 1950s, Erwin Chargaff discovered that the amounts of nitrogenous bases in DNA were always found in proportions where A=T and C=G. This observation came to be known as Chargaff's rules.

This finding proved immensely useful when James Watson and Francis Crick discovered the double-helix structure of the DNA molecule.