Molecules that, when joined together, make up the structural units of RNA and DNA. In DNA these are (adenine, thymine, guanine and cytosine), whereas in RNA thymine is replaced by uracil.
Molecules that, when joined together, make up the structural units of RNA and DNA. In DNA these are (adenine, thymine, guanine and cytosine), whereas in RNA thymine is replaced by uracil.