Microbiology MCQs

Page No. 17

Dark ground microscopy is useful to identify______________?


aMycoplasma


bChlamydiae


cRickettsiae


d Spirochaetes


View Answer Spirochaetes

The interaction of antigens with antibodies on the surface of a mast cel leads to degranulation and anaphylaxis. The mast cell granules produce anaphylaxis because they contain________________?


aLysosomes


bProteolytic enzymes


cLymphotoxins


dVasoactive mediators


View Answer Vasoactive mediators

The Ig found in exocrine secretions is_____________?


aIgG


bIgD


cIgM


dIgA


View Answer IgA

Bacterial spores are destroyed by_______________?


a Boiling at 100°C


bDisinfection by hypochlorite solution


c Autoclave


dPasteurisation


View Answer Autoclave

Which of the following is not a feature of anaphylaxis ?


aDelayed reaction


bImmediate reaction


cpassive transfer by serum


dNone of the above


View Answer Delayed reaction

compared with autoclave, use of a dry heat over for sterilization has the following disadvantages______________?


aTime-consuming


b Less effective


cCauses instruments to rust


dCauses sharp instruments to dull


View Answer Time-consuming

Sterilisation is______________?


aPathogens killed but spores are not affected


bOnly pathogenic micro-organisms killed


cNon-pathogenic killed


dAll pathogenic and non-pathogenic microorganisms killed



Rideal Walker test is used to determine the efficiency of the_____________?


aDisinfectant


bMoist heat sterilisation


cAntibiotics


dDry heat sterilization


View Answer Disinfectant

All are not true for cultivation of anaerobic organisms except_______________?


aIncubator


banaerobic jar


cRefrigerator


dCentrifuge


View Answer anaerobic jar

Multiple drug resistance of bacteria depends on which of the following_______________?


aResistance transfer factor (RTF)


bColicigenic factor (Col)


cFertility factor (F+)


dAll of the above



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