5 1 Chemical
Composition
of Nucleic
Acids
Rationalised 2023-24
298
Chemistry
Uracil (U)
Thymine (T)
Cytosine (C)
DNA contains four bases viz adenine (A), guanine (G), cytosine (C)
and thymine (T) RNA also contains four bases, the first three bases are
same as in DNA but the fourth one is uracil (U)