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- 8. Describe why viruses are typically not considered to be alive.4. Write a discussion on the "Structure of Virus". (You may read chapter 17 and any other peer- reviewed material such as scientific journals etc. that you can find to write your discussion).1. Why do symptoms of certain viral infections occur after having disappeared for a period of time?
- 7. Does the fact that viruses can form crystals imply that viruses might be alive?2. How does a naked virus differ from an enveloped virus? In your answer please include how an enveloped virus obtains its envelope and what the envelope is made of. Both naked and enveloped viruses can be said to have "protection" due to their structural make up. What is each protected from?4. Each year in late winter a behavioral “disorder" engulfs the people of New Orleans, Louisiana, reaching a climax on the day before Ash Wednesday. Together with virologists at Louisiana State University, you have isolated a virus from the affected people that you suspect is responsible for this condition. You have named the new isolate Mardi Gras virus (MGV). You have found a convenient host cell in which to grow MGV in the laboratory. The following table lists some of the properties of MGV Initial Data for Mardi Gras Virus you have discovered. Experiment Observation Physical nature of the virion Electron microscopy (EM) reveals 100-nm particles; shape indicates presence of envelope with visible surface projections; ether destroys particle integrity. Chemical nature Digested with RNase; degraded by of viral genome alkali; resistant to DNase. Informational nature of viral Genome cannot be translated in cell- free protein synthetic system. genome With NTP precursors: catalyzes RNA…
- 1. Which of these do all viruses have? An envelope membrane A phospholipid bilayer Genetic material A nucleus and organelles1. What is a virus and how does it infect its host? 2. Differentiate Gram positive bacteria from Gram negative bacteria19. An investigaor is conducting a study of n outbreak of severe nausea, vomitting and diarrhea among28 guests in a hotel. It is found that the affected guests stayed in rooms located in the east wing of the thrid floorof the hotel during a single3-week period. The causal virus most likely has which of the following chracteristics? (A) DNA genome (B) Helical symmetry (C) No envelope (D) No polymerase gene (E) Segmented genome
- 1. Throughout history there are many different types of virus that have caused impacts both small and large. Is there a possibility a virus could be considered a "good virus"? Please provide an argument for both yes and no with the use of a proper example.15. Explain what is meant by horizontal, vertical, and vector-borne transmission of viruses. (6 marks )1. Your doctor tells your friend that he has a viral infection in his throat. The pain is intolerable and he has an upcoming exam to study for. He is mad at his doctor for not prescribing him an antibiotic. How would you explain to him the rationale behind his doctor’s decision? Explain that a virus can’t be treated with an antibiotic and why