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MCQs

Total Questions : 49 | Page 5 of 5 pages
Question 41. . The process of Gram staining is based on the ability of bacterial cell wall
  1.    to retain the safranin dye
  2.    to retain the crystal violet dye during solvent treatment.
  3.    to retain part of both dyes
  4.    none of above
 Discuss Question
Answer: Option B. -> to retain the crystal violet dye during solvent treatment.
Question 42. . Gram staining was developed accidentally in 1884 by
  1.    Alexander Fleming
  2.    Hans Christian Gram
  3.    Joseph Christian Gram
  4.    Robert Gram
 Discuss Question
Answer: Option B. -> Hans Christian Gram
Question 43. . Which of the following shows a positive urease test?
  1.    Proteus
  2.    Klebsiella
  3.    Both (a) and (b)
  4.    None of these
 Discuss Question
Answer: Option C. -> Both (a) and (b)
Question 44. . What is the order of reagents used in the Gram stain?
  1.    Crystal violet, iodine, safranin, decolorizer
  2.    Crystal violet, iodine, decolorizer, safranin
  3.    Safranin, crystal violet, decolorizer, iodine
  4.    Crystal violet, safranin, iodine, decolorizer
 Discuss Question
Answer: Option B. -> Crystal violet, iodine, decolorizer, safranin
Question 45. . The process of Gram staining is based on the ability of bacterial cell wall
  1.    to retain the safranin dye
  2.    to retain the crystal violet dye during solvent treatment.
  3.    to retain part of both dyes
  4.    none of above
 Discuss Question
Answer: Option B. -> to retain the crystal violet dye during solvent treatment.
Question 46. . Gram staining was developed accidentally in 1884 by
  1.    Alexander Fleming
  2.    Hans Christian Gram
  3.    Joseph Christian Gram
  4.    Robert Gram
 Discuss Question
Answer: Option B. -> Hans Christian Gram
Question 47. . Which of the following(s) is/ are oxidase-positive bacteria?
  1.    Vibrio
  2.    Neisseria
  3.    Pseudomonas
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 48. .  Which of the following(s) show(s) positive results for phenylalanine deaminase test?
  1.    Providencia
  2.    Proteus
  3.    Morganella
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 49. . Which of the following organisms can be demonstrated with silver impregnation method?
  1.    Vibrios
  2.    Salmonella
  3.    Spirochaetes
  4.    Shigella
 Discuss Question
Answer: Option C. -> Spirochaetes

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