Viruses & Prions Study Guide.docx

D describe why rna viruses tend to accumulate many

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D. Describe why RNA viruses tend to accumulate many more mutations than DNA viruses. Why does this accumulation of mutations make these viruses harder to treat? 9. Describe how the genomes of the following types of virus are copied. Then, describe how the structural proteins (for example, capsid proteins) are made and assembled. For both processes, be sure to talk about what enzymes are used, and what their origin is (host vs. viral) A. ssRNA viruses with a + strand. B. ssRNA viruses with a – strand. C. ds RNA viruses. 10. A. What is contained in a retrovirus? What is the function of each component? B. Describe the biosynthesis of retroviruses, be sure to use the following terms: reverse transcriptase, viral integrase, provirus. C. Describe how a retrovirus can cause a latent viral infection and how these latent viral infections are hard to treat. D. For each of the enzymes in part A, indicate whether they are host enzymes or viral enzymes. 4
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Viruses and Prions Study Guide 11. A. Describe the structure and genetic material of the influenza A virus. What are the portals of entry and exit? B. What are the two major surface proteins in the envelope of influenza A? How many different types are there? How do they determine the severity of the influenza illness? C. Explain why you need a new flu shot every year.
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