Final answer:
Cytosine is a pyrimidine base found in DNA and RNA, forming hydrogen bonds with guanine.
Explanation:
Cytosine is a pyrimidine base found in DNA and RNA. It forms three hydrogen bonds with guanine in Watson-Crick base pairing. The nucleoside of cytosine is cytidine.
Learn more about Cytosine here:
https://brainly.com/question/18979173
