VIRUSES lesson 5: How Viruses Enter Cells Quizellenj2022-06-02T15:24:14-04:00 Please sign up for the course before taking this quiz. 1. Which receptor does coronavirus attach to?1 ACE2 CD4 CAR CD155 2. Some viruses can stick to red blood cells.1 True False 3. REVIEW: Which cycle is the one where the virus hides for a long time inside the host’s genome?1 lytic lysogenic 4. CD4 is found on T cells, which are important members of your immune system. Which virus attaches to CD4?1 HIV Influenza A Polio Adenovirus 5. Can you remember which of these is a naked virus with no envelope?1 coronavirus polio HIV influenza 6. All viruses need to merge (fuse) with the host membrane.1 True False 7. What does “clathrin coating” of an endosome do?1 It pulls the endosome along a microtubule, toward the nucleus. It acts like a scaffold, helping the endosome to form. It acts like a scissor and cuts the endosome from the membrane. It helps the virus to bind to the endosome membrane. 8. Cells have identification tags.1 True False 9. Why are the proton pumps so important in these lessons?1 Because they are needed for the virus to be able to attach to a binding site. Because they are needed for the clathrin coating to be formed around the endosome. Because viruses use the protons as an energy source so they can move. Because viruses need low pH to cause shape changes that will allow it to get out of the endosome. 10. Which one of these could NOT be a type of influenza?1 H12N3 H2N2 H1H3 H5N7 11. Which of these is NOT a glycoprotein?1 RNA NA (neuraminidase) the receptor on which sialic acid is found HA (hemagglutinin 12. Which is true of a motor protein?1 All of these. It pulls endosomes through the cell. It travels along microtubule "highways" made of protein "cables." It uses ATP energy to "walk" along the microtubule. It is made of amino acids. 13. Cell receptors where viruses bind were first discovered while Mrs. McHenry (the author) was a young adult.1 True False 14. Cell can’t communicate because they can’t talk.1 True False 15. Some enzymes act like scissors.1 True False VIRUSES lesson 4: Bacteriophages VIRUSES lesson 6: Inside a Cell Back to: VIRUSES lesson 5: How Viruses Enter Cells
