In DNA, cytosine pairs with guanine through three hydrogen bonds, forming a stable base pair. The sequence of these base pairs along the DNA strand encodes genetic information. During DNA replication, ...

Chemical structure of guanine, showing its double-ring purine structure and the functional groups involved in hydrogen bonding with cytosine. (Image: Public Domain) Guanine has the chemical formula ...

Adjacent ribose nucleotide bases are chemically attached to one another in a chain via chemical bonds called phosphodiester ... adenine (A), cytosine (C), guanine (G), and uracil (U).