Chapter 7, Problem 16P

Summary Introduction

Introduction:

According to Chargaff’s rule, in DNA of any living organism, the ratio of nitrogen bases i.e. purine and pyrimidine is $\text{1:1}$ which means number of Adenine is equal to number of Thymine ($\text{A = T}$) and number of Guanine is equal to number of Cytosine ($\text{G = C}$).

In the DNA structure Purine, Adenine (A) is always paired with pyrimidine, Thymine (T) and another purine. In the DNA structure Purine, Guanine (G) is always paired with pyrimidine, Cytosine (C).