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