1. First immunoglobulin increased during immunityIgGIgAIgDIgMQuestion 1 of 20 2. The process of gene transfer between bacterial cells that involves the uptake of naked DNA molecules is classified as which of the following?TransductionConjugationTransformationTranslocationQuestion 2 of 20 3. Standard agar recommended for susceptibility tests using antibiotic sensitivity disksPLET AgarCastenada AgarMueller Hinton AgarCetrimide AgarQuestion 3 of 20 4. Immunoglobulin bound on the surface of bacteria mediates phagocytosis by (Phagocytosis causes complement activation by)-C3b and FcReceptor mediated endocytosisLysosmal burstOxidase actionQuestion 4 of 20 5. Lysozyme degrades:RNA polymerasePeptidoglycanChitinLipopolysaccharideQuestion 5 of 20 6. Blood spills in hospital are disinfected withAbsolute alcoholCetavlonSodium hypochloriteQuarternary ammonium compoundsQuestion 6 of 20 7. Aflatoxins are produced byAspergillus nigerAspergillus.flavusAspergillus fumigatusCandidaQuestion 7 of 20 8. Varicella Zoster remains latent inMacrophagesB cellsT cellsTrigeminal GanglionQuestion 8 of 20 9. Hay fever and allergies to certain foods are examples of:Atopic allergiesImmune complex-mediated hypersensitivity reactionsCell-mediated or delayed hypersensitivity reactionsAntibody-dependent cytotoxic hypersensitivity reactionsQuestion 9 of 20 10. The role played by major histocompatibility Complex-1 and -2 is toMediate immunoglobulin class switchingTransduce the signal to T cells following antigen recognitionEnhances the secretion of cytokinesPresent antigens for recognition by T cell antigen receptorsQuestion 10 of 20 11. An eight year old child with history of pain and discharge from right ear presents with fever, neck rigidity and a positive Kerning's sign. Discharge was stained with gram stain which revealed gram positive cocci. Which of the following is the most likely organism.PseudomonasStaphylococcusPneumococcusH. InfluenzaeQuestion 11 of 20 12. Correct order of phases in bacterial growth curve:Log, lag, stationery, declineStationery, log, lag, declineDecline, log, lag, stationeryLag, log, stationery, declineQuestion 12 of 20 13. In order for a virus to infect a host cell, it must first adsorb onto the cell surface, This process necessitatesan insertion of virally specified glycoproteins into the host-cell membranean inhibition of the cellular secretion of interferon -a specific binding of the virus to a cell-membrane receptor.Phagocytic activity by the cell.Question 13 of 20 14. For uniform staining reaction, morphology & biochemical activity, it is advisable to study bacterial cultures during theLogarithmic phaseLag phaseStationary phaseDeath phaseQuestion 14 of 20 15. Best method of sterilizing disposable syringes:Gamma raysUV raysBoilingHot air ovenQuestion 15 of 20 16. The process of inducing donor DNA in a bacteria by help of bacteriophageLysogenic conversationConjugationTransductionTransformationQuestion 16 of 20 17. A viremia is characterized by which of the following?The virus is most easily spread via gastrointestinal secretions.The virus is most susceptible to circulating antibodies.Infected cells are no longer releasing virus.Infected cells are transformed.Question 17 of 20 18. The serum concentration of which of the following human IgG subclass is maximum?IgG3IgG4IgG2IgG1Question 18 of 20 19. Gram positive cocci which produce greenish colonies when cultured on blood agar, is bile insoluble and does not produce lesions when inoculated intra peritonially in mice, is:Streptococcus mitisPneumococciStaphylococci aureusStreptococcus pyogenesQuestion 19 of 20 20. Dark ground microscopy is useful to identify:SpirochaetesRickettsiaeChlamydiaeMycoplasmaQuestion 20 of 20 Loading...