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 HA (hemagglutinin the receptor on which sialic acid is found NA (neuraminidase) RNA 2. Can you remember which of these is a naked virus with no envelope?1 HIV polio influenza coronavirus 3. Which receptor does coronavirus attach to?1 ACE2 CAR CD155 CD4 4. All viruses need to merge (fuse) with the host membrane.1 True False 5. Some enzymes act like scissors.1 True False 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 Polio Adenovirus HIV 8. Why are the proton pumps so important in these lessons?1 Because viruses use the protons as an energy source so they can move. Because they are needed for the clathrin coating to be formed around the endosome. 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 virus to be able to attach to a binding site. 9. Which is true of a motor protein?1 It is made of amino acids. All of these. It pulls endosomes through the cell. It uses ATP energy to "walk" along the microtubule. It travels along microtubule "highways" made of protein "cables." 10. Cells have identification tags.1 True False 11. Which one of these could NOT be a type of influenza?1 H1H3 H2N2 H5N7 H12N3 12. Cell can’t communicate because they can’t talk.1 True False 13. Some viruses can stick to red blood cells.1 True False 14. What does “clathrin coating” of an endosome do?1 It pulls the endosome along a microtubule, toward the nucleus. 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. 15. Cell receptors where viruses bind were first discovered while Mrs. McHenry (the author) was a young adult.1 True False VIRUSES lesson 4: Bacteriophages VIRUSES lesson 6: Inside a Cell Back to: VIRUSES lesson 5: How Viruses Enter Cells
