| A | B |
| rod-shaped | bacillus |
| sphere-shaped | coccus |
| spiral-shaped | spirillum |
| latent virus | hiding in a cell |
| active virus | causing cell to make new viruses |
| AIDS | diseases caused by an RNA virus |
| DNA or RNA | nucleic acids found in viruses |
| protein coat | surrounds viral nucleic acid |
| group of bacteria | colony |
| nutrient agar | growth medium for bacteria |
| light microscope | instrument used to see bacteria |
| electron microscope | instrument used to see viruses |
| pathogen | causes disease |
| parasite | lives in or on another organism |
| saprophyte | lives off dead material |
| flagellum | whiplike tail |
| endospore | heat resistant structure |
| cell wall | protective covering |
| fission | way bacteria reproduce |
| attach | 1st step in viral infection |
| invade | 2nd step in viral infection |
| copy | 3rd step in viral infection |
| release | last step in viral infection |
| motility | ability to move around |
| antibiotic | drug that slows or stops the growth of an organism |
| toxin | poison make by an organism |
| antiseptic | chemical that kills bacteria on living tissue |
| aerobe | requires oxygen |
| anaerobe | can't live in oxygen environment |
| cyanobacteria | moneran producers |
| vaccine | used to prevent viral disease |
| HIV | virus affecting the immune system |
| AZT | drug used to treat AIDS |
| penicillin | antibiotic drug |
| nitrogen-fixing bacteria | found in root nodules of some plants |