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