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Home ‣ Biochemical Engineering ‣ Fermentation Kinetics See What Others Are Saying!
- Question
The high oxygen transfer efficiencies of airlift bioreactors is due to
Options- A. the large aspect ratio of the reactor, which leads to a high gas hold-up
- B. the large aspect ratio of the reactor, which leads to a high oxygen solubility at the base of the reactor
- C. the draft tube, which reduces bubble coalescence in the reactor
- D. all of the above
- Correct Answer
- all of the above
- 1. The sterilization method depends
Options- A. nature of additive
- B. volume and feed rate
- C. both (a) and (b)
- D. none of these Discuss
- 2. Which is true about rennet?
Options- A. It is a mixture of protease chymosin and pepsin
- B. It is a mixture of rennin and pepsin
- C. Both (a) and (b)
- D. none of the above Discuss
- 3. Larger propellers turn at the speed of
Options- A. 20 to 150 rpm
- B. 150 to 300 rpm
- C. 400 to 800 rpm
- D. 1150 rpm Discuss
- 4. Most enzymes work by
Options- A. increasing energy of activation
- B. decreasing energy of activation
- C. not affecting energy of activation
- D. none of the above Discuss
- 5. When [S] = 0.1 *KM, the velocity of an enzyme catalyzed reaction is about:
Options- A. 0.1 * Vmax
- B. 0.3 * Vmax
- C. 0.5 * Vmax
- D. 0.7 * Vmax Discuss
- 6. Concentration of the growth limiting substrate means
Options- A. trace elements concentration
- B. the concentration of the substrate that controls the growth rate of the cells
- C. sugar concentration in the fermentation medium
- D. dissolved oxygen concentration Discuss
- 7. Maintenance cost varies from
Options- A. 0-4% of the capital cost
- B. 12-16% of the capital cost
- C. 4-8% of the capital cost
- D. 8-12% of the capital cost Discuss
- 8. In the steady state the material balance equation for any component of a system is
Options- A. rate of addition + rate of removal - rate of formation = 0
- B. rate of addition - rate of removal + rate of formation = 0
- C. rate of addition + rate of removal + rate of formation = 0
- D. none of the above Discuss
- 9. For laminar flow of Newtonian fluid through a smooth round pipe, the ratio of average fluid velocity to the maximum velocity is
Options- A. 0.5
- B. 0.75
- C. 0.87
- D. 0.37 Discuss
- 10. Which of the following refers to pseudo steady state?
Options- A. d(CE)/dt = 0
- B. d(Cp)/dt = 0
- C. d(CES)/dt = 0
- D. d(Cs)/dt = d(CES)/dt Discuss
More questions
Correct Answer: both (a) and (b)
Correct Answer: Both (a) and (b)
Correct Answer: 400 to 800 rpm
Correct Answer: decreasing energy of activation
Correct Answer: 0.1 * Vmax
Correct Answer: the concentration of the substrate that controls the growth rate of the cells
Correct Answer: 4-8% of the capital cost
Correct Answer: rate of addition - rate of removal + rate of formation = 0
Correct Answer: 0.5
Correct Answer: d(CES)/dt = 0
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