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MCQs

Total Questions : 48 | Page 2 of 5 pages
Question 11.  The bacteria, which is more resistant to adverse environmental conditions, is
  1.    S sonnei
  2.    S dysenteriae
  3.    S flexneri
  4.    S boydii
 Discuss Question
Answer: Option A. -> S sonnei
Question 12. . In Widal test the significant titres for H agglutinins is
  1.    1:50 or more
  2.    1:100 ormore
  3.    1:200 or more
  4.    1:400 or more
 Discuss Question
Answer: Option C. -> 1:200 or more
Question 13. . Heat-stable enterotoxin of Escherichia coli activates
  1.    adenylate cyclase
  2.    guanylate cyclase
  3.    both of the above
  4.    none of these
 Discuss Question
Answer: Option B. -> guanylate cyclase
Question 14. . Heat-labile enterotoxin of Escherichia coli activates
  1.    guanylate cyclase
  2.    adenylate cyclase
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option B. -> adenylate cyclase
Question 15. . The bacteria that is negative for fermentation of mannitol is
  1.    S flexneri
  2.    S boydii
  3.    S dysenteriae
  4.    S sonnei
 Discuss Question
Answer: Option C. -> S dysenteriae
Question 16. . The agent(s) which can cause plague is/are
  1.    Yersinia pestis
  2.    Proteus mirabilis
  3.    Pseudomonas aeruginosa
  4.    All of these
 Discuss Question
Answer: Option A. -> Yersinia pestis
Question 17. . Transmission of pneumonic plague from man to man is through
  1.    inoculation
  2.    ingestion
  3.    droplet infection
  4.    all of these
 Discuss Question
Answer: Option C. -> droplet infection
Question 18. . Which of the following genus belongs to family Spirochaetaceae?
  1.    Treponema
  2.    Spirochaeta
  3.    Borrelia
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 19. . Salmonellae can also be killed by
  1.    pasteurisation
  2.    chlorination
  3.    boiling
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 20. .  Which of the following bacteria is/are known as coliform bacilli?
  1.    Escherichia
  2.    Klebsiella
  3.    Enterobacter
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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