Nitrogenous bases are the parts of RNA and DNA that are involved in pairing up (see also base pairs). These include cytosine, guanine, adenine, thymine (DNA) and uracil (RNA).
... of Ettore Bugatti's birth). Bugatti EB 110 The completed car was ready in 1990 but the unveiling was delayed until the anniversary date of September 15, 1991. ...