| A | B |
|---|
| DNA | deoxyribonucleic acid |
| double helix | "spiral staircase" of 2 strands of nucleotides twisting around a central axis |
| Watson & Crick | deduced the structure of DNA & built the first model |
| Chargaff's rules | A with T, C with G |
| replication | the process of synthesizing a new strand of DNA |
| DNA polymerase | enzyme that moves along DNA strands adding nucleotides to exposed bases |
| helicases | enzymes which open up the double helix by breaking hydrogen bonds |
| introns | noncoding sequences of genes |
| exons | nucleotide segments that code for amino acids |
| Barbara McClintock | discovered transposons |
