RNA Composition | MCQs

Explanation

Pyrimidine: A nitrogenous base similar to benzene (a six-membered ring) and includes cytosine, thymine, and uracil as bases used for DNA or RNA.

Adenine is a purine nucleobase

Adenine, guanine, and cytosine are common nitrogenous bases present in both DNA and RNA

Explanation

Cytosine is found in both DNA and RNA, but uracil is unique to RNA.

In RNA, uracil replaces thymine, pairing with adenine during transcription.

Explanation

Thymine is the nitrogenous base which is not present in RNA

Thymine is one of the four nucleobases found in DNA (along with adenine, guanine, and cytosine)

Whereas RNA contains uracil (U) instead of thymine.

RNA uses uracil as a complementary base to adenine during transcription,

while DNA uses thymine as a complementary base to adenine during replication.