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