| Orn was shown by in vitro analysis to be an exonuclease specific for RNA molecules shorter than five nucleotides in length. |
| The double helix unwinds and the nucleotides follow basically the same base pairing rules to form the correct sequence in the mRNA. |
| Nucleic acids are also polymers, composed of repeating units called nucleotides. |
| Starting at one end of the gene, the genetic code is read three nucleotides at a time. |
| In order to see the primary structure, the double helix of DNA is unzipped and the pattern of nucleotides is revealed. |
| Proteins encoded in overlapping reading frames from the same nucleotides have different levels of amino acid variation. |
