Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Focus on Viruses p. 1074-75
Transcript
2/8/2011 Focus on Viruses p. 1074-75 Focus on Viruses p. 1074-75 1. Name three places viruses can lurk. Computer keyboards, bird droppings, & under the fingernails 2. Viruses are nonliving because they cannot do what three things by themselves? Grow, move, & reproduce 3. What three organisms can viruses invade? Animals, plants, and bacteria 4. Name 4 of the 8 diseases listed that viruses can cause. Chicken pox, warts, cold sores, common cold, rabies, flu, hepatitis, and AIDS 5. How many viral particles can a single drop of blood contain? Billions 6. Describe the structure of a virus. They consist of a core of nucleic acid (DNA or RNA) enclosed in a protein coat called a capsid. 7. List an example of : a) an animal virus: polio b) a helical virus: tobacco mosaic virus c) a enveloped virus: HIV 8. How does a bacteriophage infect a bacterium? It attaches to it and then injects into the host cell 9. What does the Ebola virus do to humans? What strain is considered one of the most deadly viruses known? It causes massive internal bleeding; Zaire Definitions p. 475 & 476 • • • • Virus: a disease causing particle Host cell: a cell in which a virus replicates Bacteriophage: a virus that infects bacteria Capsid: A protein coat that encloses the nucleic acid of virus 1
