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