| DNA | Deoxyribonucleic acid |
| protein | comprised of amino acids; sturcture of enzymes, hemoglobin, and other structures |
| thymine | pairs up with adenine on a DNA strand |
| adenine | pairs up with thymine on a DNA strand |
| uracil | pairs up with adenine on a RNA strand |
| guanine | pairs up with cytosine on DNA and RNA strands |
| enzyme | protein that speeds up reactions; some enzymes digest substances |
| nucleus | site where DNA is found in a eukaryotic cell |
| double helix | describes the shape of DNA structure |
| Watson & Crick | scientists who first discovered the double helix shape of DNA |