TEKS Biology High School - B.4.C: Viruses
Quiz by TEKS Biology High School
High School - Biology
Science (2010) (Archived)
Texas Essential Knowledge and Skills (TEKS)
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12 questions
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- Q1The human immunodeficiency virus (HIV) often infects and destroys CD4 T cells. These CD4 T cells are one of many kinds of white blood cells that are an important part of the immune system. The most common danger related to the destruction of CD4 T cells is —a decrease in the flow of blood to vital organsa decrease in the amount of oxygen being transported to tissuesan increase in the threat of diseases caused by microorganisms and virusesan increase in the risk of high blood pressure30sB.4.C: Viruses
- Q2Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. Once a virus gains entry to the body, it invades a host cell in order to —access cellular processes for replicationmetabolize host proteins and growsynthesize antibodies for defensedeactivate the host cell’s defenses30sB.4.C: Viruses
- Q3The 1918 influenza epidemic killed between 50 million and 100 million people worldwide. This epidemic happened near the end of World War I. More people died from the influenza epidemic than were killed in the war. Which of the following explains why this virus was so deadly worldwide?Infected soldiers returning from the war spread the virus when they coughedMedical personnel often became ill as a result of exposure to airborne virus particlesAll of the aboveFood was scarce because of the war, so people were undernourished, and their immune systems were weakened30sB.4.C: Viruses
- Q4The picture shows a 3-D model of a virus called a bacteriophage. Bacteriophages can infect bacteria such as E. coli. In what way are the bacteriophage and E. coli alike?They have identical genomesThey lack membrane-bound organellesThey contain antibodiesThey reproduce by mitosis30sB.4.C: Viruses
- Q5Models of the human immunodeficiency virus (HIV) and an animal cell are shown below. What is the difference in the function of the glycoprotein structures of an HIV virion and the cilia of an animal cell?The glycoprotein structures are used to provide physical support for the viral envelope, and the cilia strengthen the cell membraneThe glycoprotein structures are used to obtain nutrition, and the cilia are used to secrete proteinsThe glycoprotein structures are used for defense, and the cilia are used for locomotionThe glycoprotein structures are used for attachment, and the cilia are used to move fluids surrounding the cell30sB.4.C: Viruses
- Q6H1N1 flu is a highly contagious viral infection caused by the influenza A (H1N1) virus. The symptoms of H1N1 flu are listed in the box below. An antiviral agent administered within 48 hours of the appearance of symptoms can reduce the severity of the illness. Why is it important to administer an antiviral agent to an infected person within 48 hours of the appearance of symptoms?The H1N1 virus does not mutateThe H1N1 virus is dormant in cellsThe H1N1 virus is transmitted through a vector host, such as a mosquitoThe H1N1 virus replicates quickly30sB.4.C: Viruses
- Q7A person infected with the human immunodeficiency virus (HIV) may not have any symptoms for a period of time. During this period the virus affects the body by doing which of the following?The virus produces toxins that weaken immune cells and prevent them from reproducingThe virus damages immune cells while using their machinery to produce copies of itselfThe virus uses nutrients meant for immune cells to fuel its own cellular respirationThe virus changes the identity of the nucleotides of immune cells to prevent the immune system from functioning normally30sB.4.C: Viruses
- Q8Severe acute respiratory syndrome (SARS) is an illness caused by a coronavirus. Symptoms including a high fever, headaches, and body aches typically occur two to seven days after infection by the virus. SARS is more serious in elderly patients. This information suggests that the reproductive cycle of the SARS virus is —lytic, because the virus causes respiratory illnesslytic, because of the quick onset of symptoms after infectionlysogenic, because the virus primarily affects older peoplelysogenic, because the virus is a coronavirus30sB.4.C: Viruses
- Q9A photograph of a virus is shown below. The projections on the surface of this virus allow the virus to —control a host cell’s DNAattach to a host cellsignal other viruses to infect a host cellmove inside a host cell30sB.4.C: Viruses
- Q10Cold sores are caused by the herpes simplex virus type 1. A company that wants to develop antiviral drugs would ask a research immunologist to study —meiosis in the virushow closely related the virus is to cold virusesthe mechanism used by the virus to infect cellsthe metabolism of the virus30sB.4.C: Viruses
- Q11In the 1880s, Louis Pasteur developed a method of weakening viruses. The weakened viruses could be injected into healthy individuals. How is this method effective in fighting viral diseases?The weakened viruses attach to unaffected viruses in the host and interrupt the viral reproductive cycle.The rate of genetic mutation in the host is decreased due to the introduction of weakened viruses.The immune system develops antibodies in response to the weakened viruses.60sB.4.C: Viruses
- Q12Which of these describes a difference between viruses and cells?Viruses have flagella, and cells have only cilia.Cells reproduce independently, and viruses require a host to reproduce.Viruses have membranes made of proteins, and cells have membranes made of nucleic acid.Cells contain protein, and viruses contain only carbohydrates.60sB.4.C: Viruses
