1, Which of the following describes a function of natural k

1, Which of the following describes a function of natural killer… 1, Which of the following describes a function of natural killer cells?A, targets and destroys virus infected cellsB, none of the aboveC, Targets parasitic helminthsD, phagocytosis of bacteria2, The major significance of Koch’s work was thatSpecific microorganisms are present in a diseased animal.Specific microorganisms cause specific diseases.Diseases can be transmitted from one animal to another.Specific microorganisms are the result of disease.Microorganisms can be cultured.3 , Which of the following definitions is incorrect?A, Endemic – a disease that is constantly present in a populationB, Epidemic – increase number of people in a population having a disease at a specified timeC, Pandemic – a disease that affects a large number of people in the world in a short timeD, Sporadic – a disease that affects a population occasionally All of the above are true.4, Which is not an effect of complement activation?A, bacterial cell lysisB, stimulation of inflammationC, stimulation of inflammationD, opsonization of antigenE, interference with viral replication 4, The thymus glandA, plays a role in the maturation of T lymphocytesB, is replaced by fibrotic tissue in adultsC, is where stimulated B cells lodge and begin to produce antibodiesD, all of the above are true F, a & b5, Cytopathic effects are changes in host cells due toA, viral infectionsB, protozoal infectionsC, fungal infectionsD, bacterial infection6. The association of endotoxin is the result of the presence ofA, phospholipidsB, peptidoglycanC, lipoteichoic acid7.Cell-mediated immunity involvesA, plasma cell production of antibodiesB, cytotoxic T cellsC, the destruction of bacteriaD, B&C8-Chlamydia is transmitted via a sexual route. This is an example ofA, Fomite transmissionB, Droplet transmission.C, Vector transmissionD, Direct contact transmission9Tapeworm in pigs transmitted to humans by eating improperly cooked pig is an example ofA, Fomite transmissionB, Vector transmissionC, Direct contact transmissionD, Vehicle transmission.10-Botulinum toxin is an exotoxin. Which of the following is false?A, It is a proteinB, It is released by living bacterial cells into their surroundingsC, It is produced by bacteria.D, All of the above are true.11 -The innate immune system involves all of the following exceptA, the production of antibodiesB, localized inflammationC, removal of foreign substances by phagocytesD, the production of interferon12, Which of the following describes a function of eosinophils?A, phagocytosis of bacteriaB, targets parasitic helminths. C, none of the above are true. D, a & b are true.13, Given the following ID50, which pathogen is most likely to cause infection?A, Vibrio cholera 10,000 B, Salmonella 1000C, Shigella 10014, Which of the following NOT an example of VEHICLE transmission of infectious disease?Question options:A, drinking fecal contaminated waterB, eating food left out overnight on counter topC, standing close to someone who has sneezedD, getting infected by air flowing into a room through an air ventBiology Science Microbiology BIO 204

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