1. During a Type I hypersensitivity reaction, leukotrienes and prostaglandin D are generated from which of the following?Arachidonic acidThymusHistamineBradykinin and other kininsQuestion 1 of 20 2. Which of the following statements about campylobacter jejuni is falsePoultry is a common source of infectionAssociated with Guillain Barre SyndromeCommonest agent responsible for campylobacterosisHumans are important reservoirs of infectionQuestion 2 of 20 3. Delayed tuberculin test response is due toT lymphocytesB LymphocytesMonocytesHistiocytesQuestion 3 of 20 4. Which type of pathogens provide the ultimate test for efficacy of sterilization?FungiSpore-formingBacteriaVirusQuestion 4 of 20 5. The antigen-binding site of antibody molecules is localized in theJ- chain.Fc receptorconstant regionFab fragmentQuestion 5 of 20 6. If Type A blood is accidentally transfused into a Type B recipient, the immediate haemolytic reaction would be the result of which of the following?IgA against the A antigenlgG against the B antigenIgM against the A antigenT cytotoxic cell activationQuestion 6 of 20 7. Which of the following is true regarding conjugation in bacteria:Requires restriction endonucleaseTransfer Of double stranded DNA occursLysis of donor bacteriaSex pili is necessaryQuestion 7 of 20 8. Streptococcus mutans can be distinguished from other streptococci byOptochin sensitivityHemolysis on blood agarProduction of extracellular polysaccharidesFermentation of mannitol and sorbitolQuestion 8 of 20 9. Sputum can be disinfected by all except:AutoclavingCresolBoilingChlorhexidineQuestion 9 of 20 10. Which of the following is anaerobic: E.coliBacteroidesPseudomonasKlebsiellaQuestion 10 of 20 11. Killer and Helper cells are part of:MonocytesB cellsT cellsMacrophageQuestion 11 of 20 12. Some bacteria get encapsulated toAchieve protection from phagocytosisTo produce sporesTo multiplyTo increase penetration capacityQuestion 12 of 20 13. All are true about Widal test except oneBaseline titer differ depending on endemicity of the diseaseAntibiotic treatment can modify resultsH agglutinins cannot differentiate between typesagglutinins lasts longer and hence is not indicative of recent infectionQuestion 13 of 20 14. The most sensitive and rapid test for diagnosis of CMV retinitis isViral antigen detection in vitreousViral antibody detection in the blood by ELISANucleic acid detection from the intraocular fluidViral isolation from the intraocular fluidQuestion 14 of 20 15. Ig predominant in saliva is:IgAIgMIgEIgDQuestion 15 of 20 16. The mechanism by which most fungi cause diseaseLecithinase productionCoagulase productionHypersensitivityExotoxin productionQuestion 16 of 20 17. Leukotrienes C4, D, and E4 are collectively known as:Slow-reacting substances of anaphylaxis (SRS-As)HeparinSerotoninHistamineQuestion 17 of 20 18. Syphilis is caused byFungiM. tuberculosisSpirochetesSalmonellaQuestion 18 of 20 19. Penicllin is usually non-toxic to human cells because human cells LACK which of the following?TopoisomerasesNuclear membranesPeptidoglycansMitochondriaQuestion 19 of 20 20. An injection of a drug into a patient who is allergic to this drug may lead to death due to:HyperglobulinemiaLow levels of histamineSevere anaphylaxis (anaphylactic shock)Localized anaphylaxisQuestion 20 of 20 Loading...