| A | B |
|---|
| protein coat | the outer shell of a virus; protects the nucleic acid |
| nucleic acid | DNA or RNA; contained in the protein coat |
| lytic cycle | a replication cycle of a virus that occurs in bacteria; virus destroys bacteria |
| lysogenic cycle | a viral replication cycle in bacteria; viral DNA joins bacteria DNA and is dormant for a time |
| proactive cycle | a viral replication cycle in eukaryotic cells; cell's ribosome are used to make more virus |
| retroactive cycle | a viral replication cycle in eukaryotic cells; viral DNA "hides" in nucleus |
| HIV | the virus that caused AIDS; a retroactive virus |
| Rhino virus family | a group of viruses that cause the common cold |
