Microbiology MCQs

Page No. 11

The facultative anaerobic bacteria are those who are_______________?


aUnable to grow in the presence of oxygen


bUnable to grow in the absence of oxygen


cAble to grow in the presence of carbon dioxide


dAble to grow in the presence of absence of oxygen



Actinomycosis is caused by______________?


aFungus


bAcid fast, non-motile bacillus


cAnaerobic, gram positive, non-acid fast bacteria.


dRetrovirus



The commonly used fluorescent dye in the detection of tubercie bacilli________________?


aAcridine orange


bThioglavin


cCongo red


dAuramine and Rhodamine



Nagglers reaction is used in the diagnosis of______________?


a Malaria


bWhooping cough


cGas gangrene


dWool sorters disease


View Answer Gas gangrene

Loss of capsule in bacteria is generally associated with______________?


a Decease in virulence


bLoss of infectivity


cInability to spread through tissue


dincrease in invasiveness



Which of the following structures, found external to the bacterial cell wall, are involved in bacterial attachment to cell surfaces?


aCapsule


bFlagella


c Pili


dMesosomes


View Answer Pili

Encapsulation in bacteria helps in__________________?


aSpore formation


bDecreased virulence


cPrevent their phagocytosis


dOxygen effect



Neurotoxin of tetanus acts on______________?


aSynapse


bMuscle


cBrain


dSpinal card


View Answer Spinal card

Organism most frequently associated with urinary tract infections is_________________?


aNeisseria gonorrhea


bEscherichia coli


cT-strain mycoplasma


dStreptococcus fecalis


View Answer Escherichia coli

Growth factor needed for Salmonella_________________?


aTryptophan


bNiacin


cB-12


dCitrate


View Answer Tryptophan

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