Which nitrogenous base pairs with guanine in nucleic acids?

Guanine is a nitrogenous base that pairs with cytosine in nucleic acids through hydrogen bonding, forming a stable base pair crucial for the structure of both DNA and RNA. In the case of DNA, guanine pairs with cytosine using three hydrogen bonds, contributing to the overall stability and integrity of the double helix structure.

In RNA, the same pairing occurs; guanine still pairs with cytosine. This pairing is essential in various biological processes, including replication and transcription, ensuring accurate transmission of genetic information. Understanding this base pairing is vital for grasping the fundamental principles of molecular biology and genetics.