Discussion
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- Question
Stringent anaerobes can be grown in a media by taking special measure as
Options- A. boiling the media for several minutes
- B. addition of cysteine
- C. passing through oxygen-free nitrogen
- D. any of these
- Correct Answer
- any of these
- 1. Semi-solid media, prepared with agar at concentrations of 0.5% or less are useful for the cultivation of
Options- A. Microaerophillic bacteria
- B. Lactobacilli
- C. E.coli
- D. all of these Discuss
- 2. Suspension cultures consist of cells and cell aggregates, growing dispersed in
Options- A. liquid medium
- B. solid nutrient medium
- C. solid or liquid medium
- D. none of these Discuss
- 3. Balanced growth is defined as
Options- A. cultures undergoing balanced growth while maintaining a constant chemical composition
- B. balancing the growth while controlling the pH
- C. balancing the growth while controlling the temperature
- D. balancing the growth while changing the nutrient composition Discuss
- 4. For most bacteria, the optimum pH for growth lies between
Options- A. 6.5-7.5
- B. 3.5-4.5
- C. 4.5-5.5
- D. 5.5-6.5 Discuss
- 5. The protoplast can be used to
Options- A. modify genetic information
- B. create plant hybrid
- C. study plant viral infections
- D. all of these Discuss
- 6. The isolation of the gonorrhoea - causing organisms, Neisseria gonorrhoeae,from a clinical specimen is facilitated by the use of media containing
Options- A. cellulose
- B. certain antibiotics
- C. succinate
- D. none of these Discuss
- 7. Which of the following is not an indirect method for the measurement of cell mass?
Options- A. Nutrient composition
- B. Cell dry weight
- C. Viscosity
- D. Heat evolution Discuss
- 8. Which of the following is the necessary step for cultivating the microorganisms?
Options- A. Preparing a culture medium for the growth of microorganisms
- B. Sterilizing in order to eliminate all living microorganisms in vessel
- C. Inoculating the microorganisms in the prepared medium
- D. All of the above Discuss
- 9. The ability of Vibrio fischeri to produce bioluminescence chemicals only when a certain population density has been reached is an example of
Options- A. Liebig's law of the minimum
- B. Shelford's law of tolerance
- C. quorum sensing
- D. Heisenberg's principle of uncertainty Discuss
- 10. A culture broth tube was very turbid at the surface but clear throughout the rest of the tube indicating that the
Options- A. organism are aerobes
- B. organism should be grown in an anaerobic chamber
- C. organism cannot produce superoxide dismutase and/or catalase
- D. organism cannot tolerate oxygen Discuss
Cell Cultivations problems
Search Results
Correct Answer: Microaerophillic bacteria
Correct Answer: liquid medium
Correct Answer: cultures undergoing balanced growth while maintaining a constant chemical composition
Correct Answer: 6.5-7.5
Correct Answer: all of these
Correct Answer: certain antibiotics
Correct Answer: Cell dry weight
Correct Answer: All of the above
Correct Answer: quorum sensing
Correct Answer: organism are aerobes
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