Which RNA base pairs with adenine?
RNA consists of a single chain of nucleotides, and DNA consists of two chains of nucleotides. Bonds form between the bases on the two chains of DNA and hold the chains together (Figure here). There are four different types of bases in a nucleic acid molecule: cytosine (C), adenine (A), guanine (G), and either thymine (T) (in DNA) or uracil (U) (in RNA). Each type of base bonds with just one other type of base. Cytosine and guanine always bond together, and adenine and thymine (or uracil) always bond with one another. The pairs of bases that bond together are called complementary bases.