VIRUSES lesson 5: How Viruses Enter Cells Quizellenjmchenry2021-10-01T23:31:57-04:00 Please sign up for the course before taking this quiz. Cell can’t communicate because they can’t talk.1 True False Some enzymes act like scissors.1 True False Why are the proton pumps so important in these lessons?1 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. Because viruses need low pH to cause shape changes that will allow it to get out of the endosome. Because viruses use the protons as an energy source so they can move. Can you remember which of these is a naked virus with no envelope?1 coronavirus influenza polio HIV Which receptor does coronavirus attach to?1 CD155 CD4 CAR ACE2 CD4 is found on T cells, which are important members of your immune system. Which virus attaches to CD4?1 Polio Adenovirus Influenza A HIV Which is true of a motor protein?1 All of these. It is made of amino acids. It travels along microtubule "highways" made of protein "cables." It uses ATP energy to "walk" along the microtubule. It pulls endosomes through the cell. All viruses need to merge (fuse) with the host membrane.1 True False Cells have identification tags.1 True False Cell receptors where viruses bind were first discovered while Mrs. McHenry (the author) was a young adult.1 True False REVIEW: Which cycle is the one where the virus hides for a long time inside the host’s genome?1 lytic lysogenic Which one of these could NOT be a type of influenza?1 H5N7 H2N2 H1H3 H12N3 Which of these is NOT a glycoprotein?1 NA (neuraminidase) RNA the receptor on which sialic acid is found HA (hemagglutinin Some viruses can stick to red blood cells.1 True False What does “clathrin coating” of an endosome do?1 It helps the virus to bind to the endosome membrane. It acts like a scaffold, helping the endosome to form. It acts like a scissor and cuts the endosome from the membrane. It pulls the endosome along a microtubule, toward the nucleus. VIRUSES lesson 4: Bacteriophages VIRUSES lesson 6: Inside a Cell Back to: VIRUSES lesson 5: How Viruses Enter Cells
