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