Microbiology MCQs

Page No. 6

Bacteria acquire characteristics by all the following except_______________?


aThrough plasmids

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bIncorporating part of host DNA

✓


cThrough bacteriophages

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dThrough conjugation

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Borrelia vincenti is always associated with______________?


aSpirochaetes

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bFusiform bacilli

✓


cTreponema vincenti

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dNone of the above

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View Answer Fusiform bacilli

Negative staining is used to demonstrate________________?


aBacterial spore

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bBacterial Flagella

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cBacterial capsule

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dBacterial fimbriae

✓


View Answer Bacterial fimbriae

The most common pathogens responsible for nosocomial pneumonias in the ICU are______________?


aGram positive organisms

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bGram negative organisms

✓


cMycoplasma

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dVirus infections

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Test for differentiating virulent form non-virulent tubercular bacilli_____________?


aAryl sulphatase test

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bNiacin test

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cNeutral red test

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dCatalase peroxidase test

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View Answer Neutral red test

Cough plate method is used to identify________________?


aY. pestis

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bPertussis

✓


cMycoplasma

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dM-Tuberculosis

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View Answer Pertussis

cAMP reaction is shown by which streptococci ?


aGroup A

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bGroup B

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cGroup C

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dGroup D

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View Answer Group B

The mechanism of genetic transfer where a phage serves as a vehicle is_______________?


a Transduction

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bTranslation

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cLysogeny

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dConjugation

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View Answer Lysogeny

Fimbriae are demonstrated by ___________________?


aCulture

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bGram stain

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cBiochemical reaction

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dHaemagglutination test

✓



Staphylococcal food poisoning includes the following features_______________?


aIncubation period of 24 hours

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bRequires immediate antibiotics

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cCommon with dairy products

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dHeat labile enterotoxin

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