What are important characteristics of viruses

What are important characteristics of viruses - 1. What are...

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1. What are important characteristics of viruses? 2. In order to cause a disease what must viruses do? 3. What is the difference between Protozoa and Bacteria 4. What is the purpose of an envelope in a virus 5. What are the three different relationship of oxygen in bacteria? 6. What happens if a bacterium interferes with the function of the lymph node? Why is the lymph node so important? 7. What is the pathogenesis of tuberculosis? 8. Why does the cell of TB make it so difficult to treat? 9. How is TB diagnosed? 10. How does chickenpox spread? 11. What os the secondary outbreak of Varicella-zoster virus called? What does it do to the body? 12. Summarize what the Varicella Zoster virus is? 13. What is the pathogenesis of Mono 14. What are antibiotics ineffective in treating Mono? How is Mono treated? 15. How is Mono transmitted?
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1. Important characteristics of viruses are that they are composed of nucleic acids that can either be DNA or RNA, they are surrounded by a capsid, some will have an membranous envelop. Viruses can only reproduce with a host cell because they lack the metabolic power to reproduce by themselves. Also viruses may or may not kill the host cell and some could remain dormant in a host cell until an opportunity causes disease activity. 2. The difference between DNA viruses and RNA viruses is that DNA viruses take place in the cell’s nucleus, they enter by endocytosis. Most DNA viruses are entirely dependent on the host cell DNA and RNA machinery. With RNA viruses they are unique because their genetic information is encoded with RNA, replication usually takes places in the cytoplasm instead of the nucleus. Also RNA viruses have a polarity that it depends on to make it single or double stranded during replication. 3. The difference between protozoa and bacteria is that, protozoans are living, one- celled creatures that can live inside or outside the cell, they are also eukaryotes, and may reproduce asexually or sexually. Bacteria are prokaryotes that reproduce only asexually, does not have a nucleus and often does not even contain organelles, also antibiotics can kill bacteria not protozoas.
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This note was uploaded on 01/19/2010 for the course BIOL 301 taught by Professor Kocache,m during the Spring '08 term at George Mason.

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What are important characteristics of viruses - 1. What are...

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