1. Characteristic feature of retiovirus is:DNA polymeraseRibonucleaseReverse transcriptaseRestriction endonucleaseQuestion 1 of 20 2. The most sensitive and rapid test for diagnosis of CMV retinitis isViral antibody detection in the blood by ELISAViral antigen detection in vitreousNucleic acid detection from the intraocular fluidViral isolation from the intraocular fluidQuestion 2 of 20 3. J chain is seen in which immunoglobulin:IgDIgG and IgMIgEIgM and IgAQuestion 3 of 20 4. Oxidase positive Gram-negative bacilli that do not show coloured colonies on Mac-Conkey MediaProteusPseudomonasShigellaSalmonellaQuestion 4 of 20 5. Process of tissue culture is known as?Chemical propagationVegetative propagationMacro propagationMicro propagationQuestion 5 of 20 6. Acute otitis media in children is most commonly due to:M. CatarrhalisH. InfluenzaStaphylococcus aureusSteptococcus pneumoniaQuestion 6 of 20 7. The following hepatitis virus is transmitted by faeco-oral route: exceptHepatitis D VirusHepatitis C VirusHepatitis E VirusHepatitis B VirusQuestion 7 of 20 8. Viruses can be isolated from clinical samples by cultivation in the following exceptAnimals.Tissue culture.Embryonated eggs.Chemically defined media.Question 8 of 20 9. All are true about Leptospirosis except:Latent period is 10 daysPenicillin G is drug of choiceIgM is formed in 5 daysUrine and faeces are main mode of transmissionQuestion 9 of 20 10. Endotoxins have all but one of the properties given below:Produced by gram positive bacteriaNot secreted outside the cellCannot be toxoidedProduced by gram negative bacteriaQuestion 10 of 20 11. Which of the following has been shown to be the most effective antimicrobial agent for reducing plaque and gingivitis long-term?ChlorhexidineQuaternary ammonium compoundsPhenolic compoundsStannous fluorideQuestion 11 of 20 12. Which of the following bacterial exotoxins converts plasminogen to plasmin?StreptokinaseM-proteinCoagulasePlasmalysinQuestion 12 of 20 13. Exotoxins are:LipoproteinLipid-polysaccharide complexNoneProtein compoundQuestion 13 of 20 14. Which of the following derives its nutrition from dead cellsP. intermediaLegionella pneumophilaBacillus subtilisALL of the aboveQuestion 14 of 20 15. All of the following protozoa may be detected by Fecal Acid Fast Stain, exceptIsosporaCyclosporaMicrosporidiaCryptosporidiumQuestion 15 of 20 16. A farmer from the sub-Himalayan region presents with multiple leg ulcers. The most likely causative agent isTrichophyton rubrumAspergillusSporothrix schenkiiCladosporiuni speciesQuestion 16 of 20 17. Dark ground microscopy is useful to identify:SpirochaetesChlamydiaeMycoplasmaRickettsiaeQuestion 17 of 20 18. Reassortment is seen in -HerpesvirusHepadnavirusAstronovirusRotavirusQuestion 18 of 20 19. The cell wall deficient bacteriaMycoplasmaRickettsiaeEhrtichiaeChlamydiaeQuestion 19 of 20 20. A boy with skin ulcer on leg, culture reveals beta hemolysis. Cultures from school children with sore throat some days back also revealed beta hemolysis. What is the similarity between bothC carbohydrate antigen is sameStrains causing both are sameM protein is sameMec A gene is related to itQuestion 20 of 20 Loading...