1. Bile esculine Agar is used for identification ofEnterococcus FaecalisStaphylococcus PyogenesStreptococci PyogenesPneumococcusQuestion 1 of 20 2. Lowest concentration of HIV is found in:BloodSalivaCSFSemenQuestion 2 of 20 3. Toxoids arenon-antigenic and toxicantigenic and non-toxicnon-antigenic and non-toxicantigenic and toxicQuestion 3 of 20 4. Filters used in biological safety cabinets:High efficiency particulate (HEPA) filterSeitz filterBerkfield filterMillipore filterQuestion 4 of 20 5. True about Bacteroides is allB. fragilis is most virulentThey are bile resistant anaerobesPresent mainly in mixed infectionSusceptible to most of the antibioticsQuestion 5 of 20 6. Serum sickness syndrome is an example ofAngioneurotic edemaAnaphylactic shockSystemic arthus reactionCell mediated immunityQuestion 6 of 20 7. Causative organism for gas gangreneClostridium tetaniE. ColiStrep. FaecalisClostridium welchiiQuestion 7 of 20 8. Hot air oven is used for sterilization of all EXCEPT:Liquid paraffinSharp instrumentRubber tubesGlasswareQuestion 8 of 20 9. Secretary piece of IgA is synthesized in assaults:T-cellsB-cellsMucosal epitheliumLymph nodesQuestion 9 of 20 10. All of the following organisms are known to survive intracellularly except:Legionella pneumophila.Neisseria meningitides.Streptococcus pyogenes.Salmonella typhi.Question 10 of 20 11. Marker for chronic persistent HBV infection isHBsAgIgM anti-HBcAnti HBsAgHBeAgQuestion 11 of 20 12. Synthesis of an immunoglobulin in membrane bound or secretory form is determined by:Allelic exclusionOne turn to two turn joining ruleDifferential RNA processingClass switchingQuestion 12 of 20 13. The serum concentration of which of the following human IgG subclass is maximum?IgG3IgG1IgG4IgG2Question 13 of 20 14. H. pylori infection is seen in all except:Duodenal ulcerFundal gastritisGastric carcinomaGastric lymphomaQuestion 14 of 20 15. The process of gene transfer between bacterial cells that involves the uptake of naked DNA molecules is classified as which of the following?TransductionConjugationTransformationTranslocationQuestion 15 of 20 16. Gram -ve bacteria stain during gram staining:Red colorColorlessBlue colorGreenQuestion 16 of 20 17. Bacteria acquire characteristics by all of the following exceptIncorporating part of host DNAThrough plasmidsThrough bacteriophagesThrough conjugationQuestion 17 of 20 18. Following hepatitis B infection transfusion disease manifests in:6 months3 months6week1 weekQuestion 18 of 20 19. In a 5 year old boy who has history of pyogenic infections by bacteria with polysaccharide-rich capsules, which of the following investigations should be done?IgA deficiencyIgG1 deficiencyIgG2 deficiencyIgA and IgG2 deficiencyQuestion 19 of 20 20. Antibody to HSV will begin to appearIn a week and reach a peak in 3 weeksOnly after one yearNo antibodies are present in primary HSVAntibodies are present In recurrent and chronic apthous stomatitis Question 20 of 20 Loading...