| Term | Definition |
| chromosome | organized structure of DNA and protein found in cells, arranged in one large loop |
| plasmids | isolated loops of DNA |
| cell wall | surrounds plasma membrane |
| capsule | present outside of the cell wall |
| pili | extensions from the outer surface |
| bacteria shapes | coccus, bacillus, spirillium |
| coccus | round (shape of bacteria) |
| bacillus | rod shaped (shape of bacteria) |
| spirillium | spiral (shape of bacteria) |
| bacterial growth patterns | diplo, strepto, staphylo |
| diplo | paired (a type of bacterial growth pattern) |
| strepto | chain (a type of bacterial growth pattern) |
| staphylo | cluster (a type of bacterial growth pattern) |
| gram staining | procedure to determine and identify bacteria |
| purple | The color of a positive gram |
| pink | The color of a negative gram |
| peptidoglycan | amount of this determines the purple or pink color |
| asexual reproduction | the method by which bacteria reproduce |
| asexual | No male and female reproduction |
| binary fission | one cell copies itself to form 2 cells |
| quick | speed of binary fission |
| binary fission | asexual reproduction of the bacteria |
| conjugation | bacteria exchange plasmids by connecting their pili |
| bacteria | plays ecological roles that decomposes nitrogen fixers, aids in digestion of foods, useful in making medicines and foods |