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- Question
Which of the following has more tolerance for acidic pH (lower pH)?
Options- A. Yeast and moulds
- B. Bacteria
- C. E. coli
- D. None of these
- Correct Answer
- Yeast and moulds
- 1. A culture broth tube was very turbid at the bottom of the tube but clear at the top of the tube indicating that the
Options- A. broth is sterile
- B. organism can tolerate oxygen
- C. organism cannot produce superoxide dismutase and/or catalase
- D. organism should be grown in an anaerobic chamber Discuss
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. The term obligate anaerobe refers to an organism that
Options- A. doesn't use oxygen but tolerates it
- B. is killed by oxygen
- C. uses oxygen when present or grows without oxygen when oxygen is absent
- D. prefers to grow without oxygen Discuss
- 7. Implicit factors
Options- A. depend on developing microflora
- B. can be synergistic
- C. both (a) and (b)
- D. none of the above Discuss
- 8. The reproduction by budding occur in
Options- A. Rhodopseudomonas acidophila
- B. Hyphomicrobium vulgare
- C. Bacillus subtilis
- D. Both (a) and (b) Discuss
- 9. Microaerophilic bacteria are those which require
Options- A. 21 % oxygen for growth
- B. low levels of oxygen for growth (lesser than O2 present in atmosphere)
- C. oxygen for activation of enzymes
- D. none of the above Discuss
- 10. An organism is completely dependent on atmospheric O2 for growth. This organism is
Options- A. osmotolerant
- B. acidophile
- C. facultative anaerobe
- D. obligate aerobe Discuss
Growth and Nutrition of Bacteria problems
Search Results
Correct Answer: organism cannot produce superoxide dismutase and/or catalase
Correct Answer: organism are aerobes
Correct Answer: quorum sensing
Correct Answer: All of the above
Correct Answer: Cell dry weight
Correct Answer: is killed by oxygen
Correct Answer: both (a) and (b)
Correct Answer: Both (a) and (b)
Correct Answer: low levels of oxygen for growth (lesser than O2 present in atmosphere)
Correct Answer: obligate aerobe
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