| A | B |
|---|
| protein | A polymner of amino acids |
| amino acid | A molecule that forms one unit of a protein chain |
| peptide bond | The chemical link between amino acids in a protein |
| kinesin | A protein that walks along a molecular road and carries a cargo |
| DNA | A polymer of nucleotides |
| nucleotide | A molecule that forms one unit in a DNA chain. |
| double helix | Two strands of DNA polymers wrapped around each other. |
| DNA polymerase | The protein machine that adds new nucleotides to a DNA chain |
