| A | B |
| nucleotides | subunits of DNA |
| replication | the process of making a copy of DNA |
| transcription | the process in which the instructions for making a protein are transferred from a gene to RNA |
| RNA | ribonucleic acid |
| DNA | deoxyribonucleic acid |
| guanine, cytosine, thymine, adenine | bases of nucleotides |
| DNA helicase | unzips two strands of DNA |
| DNA polymerase | add to individual strands of DNA to form two strands |
| amino acids | building blocks of proteins |
| translation | the process of RNA building or turning into proteins |
| Watson and Crick | developed DNA double helix model |
| Wilkins and Franklin | developed high quality X-ray photographs of strands of DNA |
| Chargaff | discovered that G goes with C and A goes with T |
| purines | made of 2 organic rings |
| pyrimidines | made of 1 organic ring |