| A | B |
| deoxyribose | sugar in DNA |
| phosphate & deoxyribose | sides of DNA |
| double helix | twisted ladder shape |
| nitrogen bases | rungs (steps) of DNA "ladder" |
| enzymes | bond nucleotides in place during DNA replication |
| replication | copying the DNA |
| interphase | when DNA replication occurs |
| nucleotide | building block of DNA |
| adenine | matches with thymine |
| thymine | matches with adenine |
| guanine | matches with cytosine |
| cytosine | matches with guanine |
| hydrogen bonds between the bases | break during DNA replication |
| sugars | on the outside of the nitrogen bases |
| gene | section of a chromosome that codes for a protein |
| DNA "code" | in the order of the nitrogen bases |