Question

Which of the following are nitrogenous bases of the pyrimidine type?

A) guanine and adenine
B) cytosine and uracil
C) thymine and guanine
D) ribose and deoxyribose
E) adenine and thymine

Answer 1

B) Cytosine and uracil.

Explanation:

Pyrimidines are nitrogenous bases with one carbon nitrogen ring in their structure i.e, cytosine, thymine and uracil. Thymine is a pyrimidine found in DNA which is replaced by uracil, a demethylated form of it, in RNA nucleotides.