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- Question
Which of the following problem makes it impossible to satisfy all of Koch's postulates?
Options- A. Microorganism causes serious symptoms in humans
- B. Microorganism cannot be isolated in pure culture
- C. Species of microorganism is in question
- D. Genes from the microorganism cannot be amplified by PCR
- Correct Answer
- Microorganism cannot be isolated in pure culture
- 1. A medium containing crystal violet dye plus sodium deoxycholate will allow
Options- A. gram (-)ve intestinal bacteria to grow
- B. gram (+)ve intestinal bacteria to grow
- C. aquatic bacteria to grow
- D. none of these Discuss
- 2. For the selection of lactobacilli present in cheddar cheese, the pH of the medium is maintained at
Options- A. 6.35
- B. 5.35
- C. 4.35
- D. 5.75 Discuss
- 3. Pseudomonas aeruginosa forms a blue water soluble pigment called
Options- A. pyocyanin
- B. chlororaphin
- C. pyoverdin
- D. ?-carotene Discuss
- 4. Which of the following bacteria dies quickly after drying?
Options- A. Treponema pallidium
- B. Mycobacterium tuberculosis
- C. Staphylococcus aureus
- D. Pseudomonas aeruginosa Discuss
- 5. The cocci which forms a bunch and irregular pattern are
Options- A. Staphylococci
- B. diplococci
- C. Tetracocci
- D. Streptococci Discuss
- 6. Mac-Conkey medium is an example of
Options- A. transport medium
- B. enrichment medium
- C. differential medium
- D. all of these Discuss
- 7. The concentration of agar to obtain semi solid media is
Options- A. 1.5-20%
- B. 0.5% or less
- C. >10%
- D. >10%but<20% Discuss
- 8. Viable plate count can be obtained using
Options- A. Spread plate method
- B. Pour plate method
- C. both (a) and (b)
- D. Hemocytometer Discuss
- 9. Selective media facilitate growth of only one kind of organism. Saboraud medium is used to selectively isolate
Options- A. coliform bacteria
- B. gram positive bacteria
- C. yeasts
- D. acid fast organisms Discuss
- 10. Stuart's transport medium is used for transport of specimen containing
Options- A. Neisseria gonorrhoeae
- B. Salmonella
- C. Vibrio cholerae
- D. Shigella Discuss
Cell Cultures and Characteristics problems
Search Results
Correct Answer: gram (-)ve intestinal bacteria to grow
Correct Answer: 5.35
Correct Answer: pyocyanin
Correct Answer: Treponema pallidium
Correct Answer: Staphylococci
Correct Answer: differential medium
Correct Answer: 0.5% or less
Correct Answer: both (a) and (b)
Correct Answer: yeasts
Correct Answer: Neisseria gonorrhoeae
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