<P> Nucleic acids then are polymeric macromolecules assembled from nucleotides , the monomer - units of nucleic acids . The purine bases adenine and guanine and pyrimidine base cytosine occur in both DNA and RNA , while the pyrimidine bases thymine ( in DNA ) and uracil ( in RNA ) in just one . Adenine forms a base pair with thymine with two hydrogen bonds , while guanine pairs with cytosine with three hydrogen bonds . </P>
<P> Nucleic acids then are polymeric macromolecules assembled from nucleotides , the monomer - units of nucleic acids . The purine bases adenine and guanine and pyrimidine base cytosine occur in both DNA and RNA , while the pyrimidine bases thymine ( in DNA ) and uracil ( in RNA ) in just one . Adenine forms a base pair with thymine with two hydrogen bonds , while guanine pairs with cytosine with three hydrogen bonds . </P>
the genetic code is contained within the nucleotide sequences of what type of organic molecule
the genetic code is contained within the nucleotide sequences of what type of organic molecule
polymeric macromolecules
polymeric macromolecules