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