Discussion
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- Question
Thiobacillus thiooxidans has an optimum pH of
Options- A. 2.0-3.5
- B. 0.5-6.0
- C. 6.5-7.5
- D. 9.0-9.5
- Correct Answer
- 2.0-3.5
- 1. Which of the following is incorrect?
Options- A. Plant cells are larger than the bacterial or fungus cells
- B. Plant cells tend to grow in clumps
- C. Plant cells are less sensitive to shear than microbial cells
- D. Plant cells are more genetically unstable than microbial cells Discuss
- 2. Which of the following is incorrect?
Options- A. Mammalian cells are larger and more complex than microorganisms
- B. Their growth rate is very fast compared to microorganisms
- C. Mammalian cells are fragile
- D. Most animal cells only grow when attached to surface Discuss
- 3. The archaebacterium Halobacterium, an extreme halophile, and Sulfolobus, a thermoacidophile, can be cultured in the presence of antibiotics such as streptomycin and chloramphenicol because
Options- A. they contain ether-linked isoprenoids in their plasma membrane
- B. they lack murein in their cell wall
- C. they contain 80S, as opposed to 70S, ribosomes
- D. all of the above Discuss
- 4. Callus cultures are amorphous cell aggregates arising from the unorganized growth of explants on an
Options- A. liquid medium
- B. solid nutrient medium
- C. aseptic solid nutrient medium
- D. solid or liquid medium Discuss
- 5. The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of
Options- A. 300-400nm
- B. 400-500nm
- C. 500-600nm
- D. 600-700nm Discuss
- 6. Which of the following is an abiotic elicitors?
Options- A. UV irradiation
- B. Osmotic shock
- C. Heavy metal ions
- D. All of these Discuss
- 7. Radical shifts in pH can be prevented by incorporating
Options- A. a buffer
- B. an oxidizing agent
- C. a reducing agent
- D. any of these Discuss
- 8. Anchorage -dependent cells require
Options- A. wettable surface for growth
- B. dry surface for growth
- C. either (a) or (b)
- D. nothing to do with the surface Discuss
- 9. 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
- 10. 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
Cell Cultivations problems
Search Results
Correct Answer: Plant cells are less sensitive to shear than microbial cells
Correct Answer: Their growth rate is very fast compared to microorganisms
Correct Answer: they lack murein in their cell wall
Correct Answer: aseptic solid nutrient medium
Correct Answer: 600-700nm
Correct Answer: All of these
Correct Answer: a buffer
Correct Answer: wettable surface for growth
Correct Answer: all of these
Correct Answer: 6.5-7.5
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