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MCQs

Total Questions : 48 | Page 1 of 5 pages
Question 1.  
Which of the following serotypes of Salmonella does not produce H2S?
  1.    S choleraesuis
  2.    S paratyphi A
  3.    Both (a) and (b)
  4.    None of these
 Discuss Question
Answer: Option C. -> Both (a) and (b)
Question 2.  Which of the following media is selective for Salmonella?
  1.    Thiosulphate citrate bile salt agar
  2.    Wilson and Blair's brilliant-green bismuth sulphite agar medium
  3.    Bile salt agar
  4.    All of the above
 Discuss Question
Answer: Option B. -> Wilson and Blair's brilliant-green bismuth sulphite agar medium
Question 3.  Which of the following is the commonest species of Salmonella for causing zoonotic disease?
  1.    S Indiana
  2.    S newport
  3.    S typhimurium
  4.    S enteritidis
 Discuss Question
Answer: Option C. -> S typhimurium
Question 4.  Xylose lysine deoxycholate (XLD) agar is better selective medium than the deoxycholate citrate agar (DCA) because
  1.    it is selective
  2.    it imparts better growth
  3.    it contains high salt concentration
  4.    it is less inhibitory to S. Dysentriae and S. flexneri
 Discuss Question
Answer: Option D. -> it is less inhibitory to S. Dysentriae and S. flexneri
Question 5.  Which of the following property(ies) is/are seen in the members of family Enterobacteriaceae?
  1.    They are catalase-positive
  2.    They are oxidase-negative
  3.    They ferment glucose
  4.    They reduce nitrates to nitrites
 Discuss Question
Answer: Option B. -> They are oxidase-negative
Question 6.  Dysentery may be caused by
  1.    enteropathogenic Escherichia coli
  2.    enteroinvasive E. coli
  3.    enterotoxigenic E. coli
  4.    verotoxigenic E. coli
 Discuss Question
Answer: Option C. -> enterotoxigenic E. coli
Question 7.  Which of the following(s) bacteria belong to the family Entero-bacteriaceae?
  1.    Yersinia
  2.    Shigella
  3.    Salmonella
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 8.  Transmission of bubonic plague is by
  1.    rat flea
  2.    inhalation
  3.    ingestion
  4.    all of these
 Discuss Question
Answer: Option A. -> rat flea
Question 9. . The reaction(s) that is/are usually positive in Escherichia coli, is/ are
  1.    Glucose fermentation
  2.    Indole reaction
  3.    Methyl red reaction
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 10. . An enrichment medium for the isolation of Shigella is
  1.    Alkaline peptone water
  2.    Terathionate broth
  3.    Selenite F broth
  4.    none of these
 Discuss Question
Answer: Option C. -> Selenite F broth

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