The pyrimidine bases are
A)6 membered ring systems containing 2 ring nitrogens.
B)fused 5 and 6 membered ring systems containing 4 ring nitrogens.
C)6 membered ring systems containing 4 ring nitrogens.
D)fused 5 and 6 membered ring systems containing 2 nitrogens.
E)none of the above

Question

Quizplus · Accepted Answer

Pyrimidine bases are six-membered ring systems containing two ring nitrogens. Examples of pyrimidine bases include cytosine, thymine, and uracil. Option B describes purine bases, which are fused five and six-membered ring systems containing four ring nitrogens. Option C and D do not accurately describe any known nucleic acid bases.

The Pyrimidine Bases Are