Question

The base not present in DNA is :

• A. uracil
• B. guanine
• C. adenine
• D. cytosine

Answer 1

Answer: (A)

Deoxyribonucleic acid (DNA) contains two types of nitrogenous base
(a) Purines $\to$ Adenine and guanine
(b) Pyrimidine $\to$ Thymine and cytosine
RNA also consist of same base pairs except thymine, in place of which uracil is present.