Identification of Bacteria problems
- 1. The process of Gram staining is based on the ability of bacterial cell wall
Options- A. to retain the safranin dye
- B. to retain the crystal violet dye during solvent treatment.
- C. to retain part of both dyes
- D. none of above Discuss
Correct Answer: to retain the crystal violet dye during solvent treatment.
- 2. Which of the following(s) show(s) positive results for phenylalanine deaminase test?
Options- A. Providencia
- B. Proteus
- C. Morganella
- D. All of these Discuss
Correct Answer: All of these
- 3. The gram-negative organisms is
Options- A. Actinomyces
- B. Bacillus
- C. Clostridium
- D. None of these Discuss
Correct Answer: None of these
- 4. The primary stain of Gram's method is
Options- A. safranin
- B. phenolpthalene
- C. crystal violet
- D. methyl red Discuss
Correct Answer: crystal violet
- 5. Which of the following(s) is/ are oxidase-positive bacteria?
Options- A. Vibrio
- B. Neisseria
- C. Pseudomonas
- D. All of these Discuss
Correct Answer: All of these
- 6. Which of the following shows a positive urease test?
Options- A. Proteus
- B. Klebsiella
- C. Both (a) and (b)
- D. None of these Discuss
Correct Answer: Both (a) and (b)
- 7. Which of the following is a primary stain for acid fast staining of mycobacteria?
Options- A. Crystal violet
- B. Carbol fuchsin
- C. Geimsa
- D. Methylene blue Discuss
Correct Answer: Carbol fuchsin
- 8. The deinococci are gram-positive cocci and rods that are distinctive in their unusually great resistance to
Options- A. radiation
- B. desiccation
- C. both (a) and (b)
- D. extreme temperatures Discuss
Correct Answer: both (a) and (b)
- 9. Which of the following inference(s) indicate(s) the ability of an organism to utilize citrate as a sole source of carbon in Simmon's citrate medium?
Options- A. Blue colour
- B. Appearance of growth
- C. Both (a) and (b)
- D. None of these Discuss
Correct Answer: Both (a) and (b)
- 10. What is the order of reagents used in the Gram stain?
Options- A. Crystal violet, iodine, safranin, decolorizer
- B. Crystal violet, iodine, decolorizer, safranin
- C. Safranin, crystal violet, decolorizer, iodine
- D. Crystal violet, safranin, iodine, decolorizer Discuss
Correct Answer: Crystal violet, iodine, decolorizer, safranin
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