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