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Home ‣ Biochemical Engineering ‣ Fermentation Reactors See What Others Are Saying!
- Question
Yeast is typically produced in fed batch reactors because
Options- A. yeast cells produce ethanol at low glucose concentrations
- B. yeast cells ferment at low glucose concentrations
- C. yeast cells respire at low glucose concentrations
- D. all of the above
- Correct Answer
- yeast cells respire at low glucose concentrations
- 1. Which medium is used for the production of Penicillin using immobilized cells
Options- A. 1% peptone medium
- B. glucose medium
- C. Yeast extract medium
- D. LB broth Discuss
- 2. Why a T-flask used in small-scale cell culture is incubated in a horizontal position?
Options- A. To save space
- B. To increase the surface area of the liquid-air interface
- C. Both (a) and (b)
- D. To increase the rate of oxygen transfer into the liquid Discuss
- 3. Permanent hardness of water may be removed by the addition of
Options- A. lime
- B. soda ash
- C. potassium permagnate
- D. sodium bicarbonate Discuss
- 4. Zeolite softening process removes both temporary and permanent hardness of water. In this process the calcium and magnesium present in water are precipitated as
Options- A. insoluble carbonates
- B. insoluble zeolites
- C. insoluble chlorides
- D. insoluble sulfates Discuss
- 5. Lag phase occurs mainly due to
Options- A. acclimatization with new environment and substrate
- B. higher growth temperature
- C. substrate disliking
- D. variation in substrate concentration Discuss
- 6. Residence time distribution (RTD) of a reactor is independent of
Options- A. micro mixing
- B. volume of reactor
- C. height of the reactor
- D. width of the reactor Discuss
- 7. In an airlift bioreactor, the air sparging region is called
Options- A. downcomer
- B. disengagement zone
- C. air riser
- D. none of these Discuss
- 8. A cylindrical reactor fitted with Rushton Turbine has a liquid volume of 100,000 litres. It has an aspect ratio (the ratio of the channel height to the width) of 2:1. The diameter of the impeller should be approximately:
Options- A. 1.3 m
- B. 3.3 m
- C. 5.3 m
- D. 7.3 m Discuss
- 9. Pseudo-steady state in a continuous reactor refers to a reactor in which
Options- A. Pseudomonads are being cultured
- B. concentration oscillate around a mean value
- C. concentration increase with time
- D. concentration decrease with time Discuss
- 10. Power number (Np) is also known as
Options- A. Froude's number
- B. Bond's number
- C. Newton's number
- D. Rayleigh's number Discuss
More questions
Correct Answer: glucose medium
Correct Answer: Both (a) and (b)
Correct Answer: soda ash
Correct Answer: insoluble zeolites
Correct Answer: acclimatization with new environment and substrate
Correct Answer: micro mixing
Correct Answer: air riser
Correct Answer: 1.3 m
Correct Answer: concentration oscillate around a mean value
Correct Answer: Newton's number
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