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MCQs

Total Questions : 49 | Page 2 of 5 pages
Question 11. Which of the following is a primary stain for acid fast staining of mycobacteria?
  1.    Geimsa
  2.    Carbol fuchsin
  3.    Methylene blue
  4.    Crystal violet
 Discuss Question
Answer: Option B. -> Carbol fuchsin
Question 12. What is the colour of gram -postive bacteria on a gram staining?
  1.    Green
  2.    Purple
  3.    Pink
  4.    Colourless
 Discuss Question
Answer: Option B. -> Purple
Question 13. What is the colour of gram-negative bacteria on a gram staining?
  1.    Green
  2.    Colourless
  3.    Pink
  4.    Purple
 Discuss Question
Answer: Option C. -> Pink
Question 14. The deinococci are gram-positive cocci and rods that are distinctive in their unusually great resistance to
  1.    both (a) and (b)
  2.    radiation
  3.    desiccation
  4.    extreme temperatures
 Discuss Question
Answer: Option A. -> both (a) and (b)
Question 15. Which of the following shows a positive urease test?
  1.    Klebsiella
  2.    Both (a) and (b)
  3.    None of these
  4.    Proteus
 Discuss Question
Answer: Option B. -> Both (a) and (b)
Question 16. Which of the following(s) is/ are oxidase-positive bacteria?
  1.    All of these
  2.    Vibrio
  3.    Neisseria
  4.    Pseudomonas
 Discuss Question
Answer: Option A. -> All of these
Question 17. What is the order of reagents used in the Gram stain?
  1.    Crystal violet, safranin, iodine, decolorizer
  2.    Crystal violet, iodine, decolorizer, safranin
  3.    Crystal violet, iodine, safranin, decolorizer
  4.    Safranin, crystal violet, decolorizer, iodine
 Discuss Question
Answer: Option B. -> Crystal violet, iodine, decolorizer, safranin
Question 18. Which of the following(s) show(s) positive results for phenylalanine deaminase test?
  1.    Providencia
  2.    All of these
  3.    Proteus
  4.    Morganella
 Discuss Question
Answer: Option B. -> All of these
Question 19. Which of the following organisms can be demonstrated with silver impregnation method?
  1.    Salmonella
  2.    Shigella
  3.    Spirochaetes
  4.    Vibrios
 Discuss Question
Answer: Option C. -> Spirochaetes
Question 20. Gram staining was developed accidentally in 1884 by
  1.    Robert Gram
  2.    Hans Christian Gram
  3.    Joseph Christian Gram
  4.    Alexander Fleming
 Discuss Question
Answer: Option B. -> Hans Christian Gram

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