1. A 10-year old child presented with severe sore throat and a grey psueudomembrane over pharynx and tonsils. The organism causing this infection is most likely -A gram negative bacillusA single-stranded positive sense RNA virusA gram positive bacillusA catablase-positive gram positive coccus that grows in clustersQuestion 1 of 20 2. Which of the following is a powerful oxidizing agent that inactivates bacteria and most viruses by oxidizing free sulfhydryl groups?FormaldehydePhenolAlcoholChlorineQuestion 2 of 20 3. Regarding IgE, which of the following is false?Cross placentaCauses anaphylaxisImmediate reactionFix complementQuestion 3 of 20 4. Which of the following structures, found external to the bacterial cell wall, are involved in bacterial attachment to cell surfaces?CapsuleMesosomesPiliFlagellaQuestion 4 of 20 5. Fungus affecting reticular endothelial systemMucormycosisRhizopusCryptococcus neoformansHistioplasma capsulatumQuestion 5 of 20 6. First chemical barrier encountered by microorganism for common exposed sites -SkinLysozymeAcidic pHLactoseQuestion 6 of 20 7. All are true regarding disinfectants except -Hypochlorites are virucidalEthylene oxide is intermediate disinfectantPhenol usually requires organic matter to actGlutaraldehyde is sporicidalQuestion 7 of 20 8. Which of the following commonly produces a positive heterophile antibody test?CytomegalovirusEpstein-Barr virusAdenovirusParainhluenza virusQuestion 8 of 20 9. Ig predominant in saliva is:IgMIgAIgDIgEQuestion 9 of 20 10. Granules in the Corynebacterium diphtheria are called by following names, exceptMetachromatic granulesVotutin granulesBabes Ernst granulesRefractile granulesQuestion 10 of 20 11. Virulence in gram negative bacteria is due toPiliLipid APeptidoglycanTeichoic acidQuestion 11 of 20 12. The serum concentration of which of the following human IgG subclass is maximum?IgG1IgG2IgG4IgG3Question 12 of 20 13. Complement binding Immunoglobin via the classical pathway is -IgG & IgDIgG & IgAIgG & IgMIgD & IgEQuestion 13 of 20 14. An abattoir worker presented with a malignant pustule on his hand that progressed to form an ulcer. Smear was taken' from the ulcer and sent to laboratory for investigation. The diagnosisUlcerating melanomaCutaneous anthraxInfected rodent ulcerCarbuncleQuestion 14 of 20 15. Dimorphism in microorganisms is characterized by the capability to produceboth a yeast phase and a mycelial phase.Both sexual and asexual spores.two distinct types of clinical infections.both by budding and by production of spores.Question 15 of 20 16. One of the following is a zoonotic diseaseTyphoidAnthraxBaccilary dysenteryCholeraQuestion 16 of 20 17. Stain used for histologic demonstration of candida hyphaePASHematoxylin & EosinAcridine orangeCarbol fuschinQuestion 17 of 20 18. Each of the following cells is an antigen-specific cell EXCEPT one Which one is this EXCEPTION?MacrophagesT helper cellsLangerhans cellsB cellsQuestion 18 of 20 19. HIV pt with malabsotion, fever, chronic diarrhoea, with acid fast positive organism. What- is the causative agentE. histolyticaGiardiaIsosporaMicrosporidiaQuestion 19 of 20 20. Which of the following is true about streptococcus pneumoniae:Gram +ve Lanceolate diplococciGram -ve diplococcicGram +ve coccobacilliExtracellular grain -ve diplococcicQuestion 20 of 20 Loading...
