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