Question

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Questions: 1. List the components that all types of viruses have in common. Then describe the function of each component. (Short answer-2 points- 1 for a complete and correct list of components and 1 for correctly assigning the function for each component. 2. Viruses are living things that function entirely on their own (True/False)- 1 point. 3. List 2 different ways that a virus can gain access to the body of the host (Short answer-1 point) 4. Explain how a virus can replicate even though it lacks ribosomes and other organelles needed for replication. (Short answer-1 point). 5. Describe the process that viruses use to infect (i.e. gain access to the interior) of host cells. Make sure to mention the key structure(s)on the virus and the cell that interact during a viral infection. Underline these structures (Short answer-2 points; 1 point for the description of the process; 1 point for correct identification of the structural components). 6. A fever is noted as a symptom of a viral infection, including a COVID-19 infection. What is the biological reason that infected hosts get a fever? (Short answer; 1 point). 7. It is hypothesized that the COVID-19 in humans originated from animals. Explain the biological reason that a virus can jump from one species to another (Short answer; 1 point). 8. The COVID-19 virus is the first example of a coronavirus. There has never been another coronavirus ever reported (True/False- 1 point). 9. Fever and cough are all that is needed to make a positive diagnosis for COVID-19 (True/False; 1 point) 10. Using what you learned about the process that viral particles use to infect (gain entry into hose cells) and replicate, design a cure for COVID-19. (Short answer; 2 points)

Answer 1

1. Components of viruses- genome either DNA or RNA, Capsid, envelope

Function of component-

a. Genome - It contain viral gene expression various viral molecules after infecting host cells

b. Capsid- It is protein coat encloses viral genome

C. Envelope- It surround Capsid and may bear spike like structure which act as antireceptor( help for adhesion on host cell)or act as antigen

2. Ans. False

3. Viruses may enter through body opening like mouth, eyes, nose. etc

4. Viruses use hosts ribosome and enzymes for replication and protein synthesis

5. Virus enter host body and infect cell by attachment , penetration, Biosynthesis( viral genome, viral proteins), assembly of virus progeny and release by host cell lysis.

Virus first come in contact with host cell membrane remain attached to receptors of host cell by its antireceptor. Then it penetrate into host cytoplasm . During Biosynthesis viral enzymes, viral genome and proteins synthesised by using hosts biosynthetic machinary. Then all viral proteins and genome assemble into complete virion and they lyse host cell and release out.

6. After viral infection raised body temperature indicate hosts immune system stimulated to destroy viruses.

7. Due to mutation viral coat or envelope protein may change and it couse infection to other species

8. Ans. False

9. Ans. False

10. Still there is no specific treatment for cure covid 19