<prompt> If the percentage of thymine residues in DNA is 28. What is the percentage of cytosine?28443622  <response>: According toChargaffs rulein double-stranded DNA, the total purine content is equal to the pyrimidine content. In a double stranded DNA, Chargaffs rule is followed Since , so 28 2828 56 100- 100-56 44 As , so 44 2 22 Chargaffs Rule only applies to double-stranded DNA, due to the complementary base pairing that occurs between A-T and C-G. 