What is Nucleobase?
A '''nucleobase''' is a part of [[RNA]] and [[DNA]] which may be involved in pairing (see [[base pair]]). Nucleobases are important for [[genetics]]. They include [[cytosine]], [[guanine]], [[adenine]], [[thymine]] in ([[DNA]]), [[uracil]] in ([[RNA]]) and [[xanthine]] and [[hypoxanthine]] (mutated forms of guanine and adenine). These are abbreviated as C, G, A, T, U, X and HX [[wikt:respectively|respectively]]. They are usually simply called '''bases''' in genetics. Because A, G, C and T appear in the DNA, these molecules are called '''DNA-bases'''; A, G, C and U are called '''RNA-bases'''. Uracil replaces thymine in RNA. ==Other websites== *[http://www.elmhurst.edu/~chm/vchembook/582dnadoublehelix.html Base pairing in DNA Double Helix (shows specific hydrogen bonds)] {{Webarchive|url=https://web.archive.org/web/20060621234655/http://www.elmhurst.edu/~chm/vchembook/582dnadoublehelix.html |date=2006-06-21 }} [[Category:Organonitrogen compounds]] [[Category:DNA]] {{biology-stub}}