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).
... the town has a total area of 23.9 km² (9.2 mi²). 21.9 km² (8.5 mi²) of it is land and 2.0 km² (0.8 mi²) of it is water. The total area is ...