| A | B |
| DNA | Blueprint of Life |
| Nucleotide | A subunit that consists of a sugar, a phosphate, and a base. |
| RNA | A copy of part of a DNA strand. |
| Ribosome | The "Factory" organelle that creates new proteins. |
| Mutation | A change in the nucleotide-base sequence of a gene or DNA molecule. |
| Gene | a segment of DNA that codes for a protein wich in turn codes for a trait. |
| Four Bases | Adenine, Thymine, Guanine, and Cytosine |
| X-Ray Diffraction | X-rays are aimed at the DNA molecule and the ray bounces off. |
| Base Pair Rule | A always goes with T, C always goes with G |
| Double Helix | Shaped like a twisted ladder. |
| Erwin Chargaff | Discovered base pair rule. |
| Rosalind Franklin | Used x-rays to find DNA's spiral shape. |
| Watson and Crick | Built a 3-D model of DNA. |
| Proteins | DNA is wound around these. |
| mRNA | The RNA that is a mirror-like copy of part of a DNA strand. |
| Amino Acid | Groups of three bases code for this. |
| tRNA | The RNA that translates the messenger RNA message. |
| Insertion | When an extra base is added. |
| Substitution | When the wrong base is used. |
| Deletion | When a base is left out. |
| Mutagen | Any physical or chemical agent that can cause a mutation in DNA. |
| Center of the base pair | Where DNA splits to make more copies. |
| Replicate | To make a copy. |