The monomers of DNA and RNA are nucleotides, which are made up of a phosphate group, a five-carbon sugar and a nitrogenous base<span>. In DNA, the </span>nitrogenous bases<span>are </span>adenine<span>, </span>cytosine<span>, guanine and </span>thymine<span>. In RNA, the </span>nitrogenous bases<span> are</span>adenine<span>, guanine, </span>cytosine<span> and </span>uracil<span>.</span>
