Viruses
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| 8910662566 | virus | particle made up of nucleic acid, protein, and in some cases lipids that can replicate only by infecting living cells. |  | 0 |
| 8910662567 | capsid | the outer covering of protein surrounding the nucleic acid of a virus |  | 1 |
| 8910662568 | viral envelope | a membrane that cloaks the capsid that in turn encloses a viral genome |  | 2 |
| 8910662569 | bacteriophages | viruses that infect bacteria |  | 3 |
| 8910662571 | lytic cycle | a viral reproductive cycle in which copies of a virus are made within a host cell, which then bursts open, releasing new viruses |  | 4 |
| 8910662573 | prophage | the viral DNA that is embedded in the host cell's DNA |  | 5 |
| 8910662574 | lysogenic cycle | a viral reproductive cycle in which the viral DNA is added to the host cell's DNA and is copied along with the host cell's DNA |  | 6 |
| 8910662576 | retrovirus | An RNA virus that reproduces by transcribing its RNA into DNA and then inserting the DNA into a cellular chromosome; an important class of cancer-causing viruses. |  | 7 |
| 8910662577 | reverse transcriptase | a polymerase that catalyzes the formation of DNA using RNA as a template |  | 8 |
| 8910662578 | HIV | retrovirus that causes aids |  | 9 |
| 8910662579 | AIDS | a syndrome caused by the human immunodeficiency virus (HIV) that renders immune cells ineffective, permitting opportunistic infections, malignancies, and neurologic diseases to develop; transmitted sexually or through contaminated blood |  | 10 |
| 8910662580 | provirus | Viral DNA that inserts into a host genome. |  | 11 |
| 8910662586 | restriction enzyme | any of the enzymes that cut nucleic acid at specific restriction sites and produce restriction fragments |  | 12 |
