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