Microbiology MCQs

Page No. 17

Dark ground microscopy is useful to identify______________?


aMycoplasma

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bChlamydiae

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cRickettsiae

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d Spirochaetes

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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

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bProteolytic enzymes

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cLymphotoxins

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dVasoactive mediators

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View Answer Vasoactive mediators

The Ig found in exocrine secretions is_____________?


aIgG

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bIgD

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cIgM

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dIgA

✓


View Answer IgA

Bacterial spores are destroyed by_______________?


a Boiling at 100°C

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bDisinfection by hypochlorite solution

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c Autoclave

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dPasteurisation

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View Answer Autoclave

Which of the following is not a feature of anaphylaxis ?


aDelayed reaction

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bImmediate reaction

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cpassive transfer by serum

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dNone of the above

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View Answer Delayed reaction

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


aTime-consuming

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b Less effective

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cCauses instruments to rust

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dCauses sharp instruments to dull

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View Answer Time-consuming

Sterilisation is______________?


aPathogens killed but spores are not affected

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bOnly pathogenic micro-organisms killed

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cNon-pathogenic killed

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dAll pathogenic and non-pathogenic microorganisms killed

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


aDisinfectant

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bMoist heat sterilisation

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cAntibiotics

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dDry heat sterilization

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View Answer Disinfectant

All are not true for cultivation of anaerobic organisms except_______________?


aIncubator

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banaerobic jar

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cRefrigerator

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dCentrifuge

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View Answer anaerobic jar

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


aResistance transfer factor (RTF)

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bColicigenic factor (Col)

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cFertility factor (F+)

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dAll of the above

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