Microbiology MCQs

Page No. 6

Bacteria acquire characteristics by all the following except_______________?


aThrough plasmids


bIncorporating part of host DNA


cThrough bacteriophages


dThrough conjugation



Borrelia vincenti is always associated with______________?


aSpirochaetes


bFusiform bacilli


cTreponema vincenti


dNone of the above


View Answer Fusiform bacilli

Negative staining is used to demonstrate________________?


aBacterial spore


bBacterial Flagella


cBacterial capsule


dBacterial fimbriae


View Answer Bacterial fimbriae

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


aGram positive organisms


bGram negative organisms


cMycoplasma


dVirus infections



Test for differentiating virulent form non-virulent tubercular bacilli_____________?


aAryl sulphatase test


bNiacin test


cNeutral red test


dCatalase peroxidase test


View Answer Neutral red test

Cough plate method is used to identify________________?


aY. pestis


bPertussis


cMycoplasma


dM-Tuberculosis


View Answer Pertussis

cAMP reaction is shown by which streptococci ?


aGroup A


bGroup B


cGroup C


dGroup D


View Answer Group B

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


a Transduction


bTranslation


cLysogeny


dConjugation


View Answer Lysogeny

Fimbriae are demonstrated by ___________________?


aCulture


bGram stain


cBiochemical reaction


dHaemagglutination test



Staphylococcal food poisoning includes the following features_______________?


aIncubation period of 24 hours


bRequires immediate antibiotics


cCommon with dairy products


dHeat labile enterotoxin



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