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