| A | B |
|---|
| Adenine | Nitrogen base; pairs with Thymine |
| Thymine | Nitrogen base; pairs with Adenine |
| Cytosine | Nitrogen base; pairs with Guanine |
| Guanine | Nitrogen base; pairs with Cytosine |
| Nucleotide | Monomer of DNA; sugar, phosphate, nitrogen base |
| Double Helix | Twisted ladder shape of DNA |
| James Watson, Francis Crick | Discovered structure of DNA |
| Rosalind Franklin | Took x-ray pictures of DNA; helped discover the structure |
| Base Pairing | Adenine-Thymine; Cytosine-Guanine |
| Avery | Discovered that DNA carries genetic information |
| DNA | DeoxyriboNucleic Acid |
| Transformation | One bacteria strain changed to another |
| Sugar-Phosphate Backbone | "Uprights" of the twisted ladder |
| Nitrogen Base Pairs | "Rungs" of the twisted ladder |
| Hydrogen Bonds | Bonds between nitrogen bases in a base pair |
