Question
Chemistry Question on Hydrocarbons
Which among the following nitrogen bases of polynucleotides is NOT derived from pyrimidine?
A
Cytosine
B
Uracil
C
Thymine
D
Guanine
Answer
Guanine
Explanation
Solution
Cytosine, Uracil, and Thymine are all derived from pyrimidine. Guanine, on the other hand, is derived from a different type of nitrogenous base called purine. Purines have a different structure compared to pyrimidines.
Therefore, the correct answer is (D) Guanine.