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