Question

If adenine is 31% in DNA, calculate the percentage of cytosine. Explain briefly. 
 

Hint:

Chargaff’s rule ensures complementary base pairing, maintaining DNA structure and accurate replication during cell division.

Answer 1

Adenine and thymine each constitute 31%, accounting for 62% of the total. Cytosine and guanine comprise the remaining 38%. This implies cytosine is 19%, consistent with Chargaff’s rule, which states that purines (adenine, guanine) always pair with pyrimidines (thymine, cytosine).