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Home ‣ Biochemical Engineering ‣ Fermentation Kinetics See What Others Are Saying!
- Question
Fermentor should be filled with medium upto
Options- A. 65-70%
- B. 70-75%
- C. 75-80%
- D. 80-85%
- Correct Answer
- 75-80%
- 1. Which of the following statements would be appropriate while comparing bubble column and air lift fermenter of the same size?
Options- A. The average bubble size is smaller in an airlift bioreactor
- B. Oxygen transfer rate is higher in an airlift bioreactor
- C. The surface area for gas exchange is higher in an airlift bioreactor
- D. All of the above Discuss
- 2. The air riser is located on the outside of the draft tube for the large-scale airlift bioreactors because of
Options- A. higher oxygen transfer rates
- B. a small sparge ring
- C. better heat transfer efficiencies
- D. all of these Discuss
- 3. A culture in a closed vessel to which no additional medium is added and from which no waste products are removed is called a __________ culture.
Options- A. continuous
- B. batch
- C. fed-batch
- D. semi continuous Discuss
- 4. During the log phase cell numbers increase exponentially
Options- A. because cells produce enzymes
- B. because cells do not have cell membranes
- C. because cells are autocatalysts
- D. because the rate of cell division increases exponentially Discuss
- 5. The diameter of the baffles in a standard stirred tank bioreactor ranges from
Options- A. 1/10th - 1/12th of the tank diameter
- B. 1/3rd - 1/4th of the tank diameter
- C. 1/15th - 1/20th of the tank diameter
- D. 1/20th - 1/25th of the tank diameter Discuss
- 6. The contents in bubble column and air lift reactor are mixed through
Options- A. compressed air
- B. a mechanical internal moving part
- C. external pumping
- D. any of these Discuss
- 7. Chromatography is based on the
Options- A. different rate of movement of the solute in the column
- B. separation of one solute from other constituents by being captured on the adsorbent
- C. different rate of movement of the solvent in the column
- D. any of the above Discuss
- 8. A common filter medium is the cloth filter generally made of
Options- A. canvas
- B. synthetic fabrics
- C. metal or glass fiber
- D. all of these Discuss
- 9. The activated sludge process consists of returning a portion of the clarifier
Options- A. effluent water entering the reactor
- B. influent water coming out of the reactor
- C. influent water entering the reactor
- D. effluent water coming out of the reactor Discuss
- 10. Functional groups of the nonessential amino acid residues that are suitable for the immobilization process are
Options- A. free ?-, ?- or ? carb oxyl groups
- B. ? or ? amino groups
- C. phenyl, hydroxyl, sulfhydryl or imidazole groups
- D. all of the above Discuss
More questions
Correct Answer: All of the above
Correct Answer: better heat transfer efficiencies
Correct Answer: batch
Correct Answer: because cells are autocatalysts
Correct Answer: 1/10th - 1/12th of the tank diameter
Correct Answer: compressed air
Correct Answer: different rate of movement of the solute in the column
Correct Answer: all of these
Correct Answer: influent water entering the reactor
Correct Answer: all of the above
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