Question

1. explain chargaffs rule.

Explanation:

Chargaff's rule states that in DNA, the amount of adenine (A) is equal to the amount of thymine (T), and the amount of guanine (G) is equal to the amount of cytosine (C). This means \( A = T \) and \( G = C \). Also, the sum of purines (A + G) is equal to the sum of pyrimidines (T + C). These base - pairing rules are fundamental for understanding DNA structure and replication.

Answer:

Chargaff's rule states that in DNA, \( A = T \), \( G = C \), and \( (A + G)=(T + C) \).