Question

True or false:

Pyrimidines are six-membered nitrogen containing ring compounds found in both RNA and DNA.

Answer 1

Pyrimidines have a six-membered ring featuring two nitrogen atoms and include uracil, thymine, and cytosine; they are found in both RNA and DNA, which makes the initial statement true.

Step-by-step explanation:

The statement that pyrimidines are six-membered nitrogen containing ring compounds found in both RNA and DNA is true. Pyrimidines, which include uracil, thymine, and cytosine, are indeed heterocyclic amines with a six-membered ring featuring two nitrogen atoms. Cytosine is present in both DNA and RNA, thymine is unique to DNA, and uracil is unique to RNA. In contrast, purines, which include adenine and guanine, consist of a pyrimidine ring fused to a five-member ring with nitrogen atoms, creating a larger double-ring structure.