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).
... 3.63% African American, 0.16% Native American, 1.05% Asian, 0.03% Pacific Islander, 2.62% from other races, and 2.03% from two or more races. 9.15% of the population ...