Download Name Khan academy viruses https://www.khanacademy.org/science

Name __________________________
Khan academy viruses
https://www.khanacademy.org/science/healthcare-andmedicine/influenza/influenza-pathology/v/viruses
Watch the Khan academy video describing how viruses infect host cells and turn
cells into virus replicating machines.
1.
2.
3.
4.
Describe the basic structure of viruses.
Why don’t viruses fit into the standard definition of life?
Describe several methods by which viruses can enter host cells.
What happens when viruses get into a cell? What molecules enter the cells in
particular?
5. Why does Sal Kahn say that viruses “hijack” the cell? Explain this hijacking
mechanism.
6. What happens to the newly formed viruses that have been produced within
the cell? Also, what happens to the cells that house the viruses?
7. Why is HIV considered a “retrovirus”?
8. What does the enzyme reverse transcriptase do?
9. What do retroviruses do to our genetic makeup?
10. Is it worse for viruses to infect somatic cells or gametes? Explain your
answer.
11. What are endogenous retroviruses?
12. How do viruses exhibit “horizontal transfer of DNA” via transduction?
13. What do we name viruses that infect bacteria?
14. How is the lytic cycle different from the lysogenic cycle?
15. What kind of cell does HIV infect?
16. List a variety of different viruses that can infect you!