Question

A key discovery leading to the structure of dna was done by chargaff. He found that ____. Select all that apply.

Answer 1

Answer;

A. The amount of A equals the amount of T, and the amount of G equals the amount of C

C. The tetra nucleotide hypothesis is false

Explanation;

Chargaff's rule states that DNA from any cell of any organism has a 1:1 ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine, a purine base, is equal to cytosine, a pyrimidine base; and the amount of adenine, a purine base, is equal to thymine, a pyrimidine base.

Chargaff's rules are important because they point to a kind of “grammar of biology”, a set of hidden rules that govern the structure of DNA.