Which nitrogenous base pairs with Cytosine in DNA?

Cytosine (C) pairs with Guanine (G) in DNA through three hydrogen bonds. This specific base pairing is fundamental to the structure of DNA, allowing for the double helix to maintain its integrity and stability. The pairing is a result of the complementary nature of these bases, which is crucial during DNA replication and transcription processes. Each base has a unique structure that allows it to bond specifically with its partner, ensuring accurate genetic information is passed on during cell division. Guanine, being a purine, complements Cytosine, which is a pyrimidine, adhering to the principle that a purine pairs with a pyrimidine in the DNA double helix structure. This pairing is well-established in molecular biology and is critical for the proper encoding of genetic information.