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ANSWER KEY TO BACTERIA AND VIRUS REVIEW SHEET 1. Virus means poison 2.-3. The two prokaryotic kingdoms are Eubacteria and Archaebacteria 4. Eukaryotic cells have a true nucleus. 5. Prokaryotic cells do not have a true nucleus. 6. A pair of bacteria is known as diplo. 7. A cluster of bacteria is staphlo. 8. A chain of bacteria is called strepto. 9. A rod shaped bacterium is called bacillus 10. A sphere shaped bacterium is called coccus. 11. A spiral shaped bacterium is called sprillium. 12. Bacteria that do not require oxygen and die in its presence are called obligate anaerobes. 13. Viruses reproduce in host cells. 14. – 18. The 5 stages of the viral reproductive cycle are attachment, injection, replication, assembly and lysis (release). 19. The viral cycle that destroys the host cell is the lytic cycle. 20. The lysogenic cycle attacks the host cell but does not destroy it. Also known as the sleeping viral cycle.