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