Structure Of Dna And Rna

Nucleic acids such as DNA and RNA are made up of nitrogenous bases, which are classified into two categories:

• Purines: Adenine (A) and Guanine (G)
• Pyrimidines: Cytosine (C), Thymine (T), and Uracil (U)

In DNA:

• The pyrimidines present are Cytosine (C) and Thymine (T)
• Uracil (U) is not found in DNA; it is found in RNA instead

Hence, the correct pair of pyrimidine bases present in DNA is: