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