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