Viruses

1. Define the term virus. List and describe the three main types of viral structures.

2. Why must a virus enter a living cell in order to reproduce?

3. What is a bacteriophage? What are the parts of a bacteriophage?

4. Distinguish between a lytic cycle and a lysogenic cycle.

5. Describe what happens in the following stages of bacteriophage infection: attachment and penetration, virion assembly, and release of virions.

6. How does Covid-19 spread? What are its symptoms?

7. What is the name for the virus that causes Covid-19? How does the virus attach to a cell? What kinds of cells can it attach to?

8. Describe two ways that the virus can enter a cell.

9. Explain how the virus replicates within the cell.

10. How are mutations of the genetic material of the virus caught and corrected by the virus?