Discussion
Home ‣ Biochemical Engineering ‣ Fermentation Kinetics See What Others Are Saying!
- Question
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
- Correct Answer
- better heat transfer efficiencies
- 1. The relationship between the del factor, temperature and time is given as
Options- A. ? = A.t. e-E/RT
- B. ? = 1/(A.t. e-E/RT)
- C. ? = A.t. eE/RT
- D. ? = A.t.T Discuss
- 2. The reduction of number of cells from 1010 to one will result into the del factor (?) of
Options- A. 1
- B. 10
- C. 23
- D. 103 Discuss
- 3. Diauxie is
Options- A. growth factors
- B. microbiological die off
- C. the simultaneous uptake of nutrients
- D. the stagewise uptake of nutrients Discuss
- 4. The K used in the equation for X10=2.303/K depends upon
Options- A. nature of the filter material
- B. linear velocity of the air passing through filter
- C. both (a) and (b)
- D. thickness of the filter Discuss
- 5. For the extractions operation, the selectivity should be
Options- A. > 1
- B. < 1
- C. 1
- D. zero Discuss
- 6. The function of a mechanical seal is to
Options- A. prevent contaminants entering the reactor
- B. prevent cells from leaving the reactor
- C. both (a) and (b)
- D. prevent air to enter Discuss
- 7. Which of the following physical method is used as germicidal in modern time for the treatment of drinking water?
Options- A. Chlorination
- B. Treating with potassium permagnate
- C. UV radiation
- D. Treating with bleaching powder Discuss
- 8. In the accelerated phase, cell starts to
Options- A. increase and the division rate increases to reach a maximum
- B. decrease and the division rate increases to reach a maximum
- C. increase and the division rate decreases to reach a maximum
- D. increase and the division rate increases to reach a minimum Discuss
- 9. Which of the following enzyme is responsible for causing vitamin B deficiency disease beriberi?
Options- A. Ascorbic acid oxidase
- B. Thiaminase
- C. Lipoxygenase
- D. None of these Discuss
- 10. A cylindrical reactor has a liquid volume of 100,000 litres. It has an aspect ratio the ratio of the channel height to width of 1:1. The height of the liquid in the reactor will be approximately:
Options- A. 1.0 m
- B. 3.0 m
- C. 5.0 m
- D. 7.0 m Discuss
More questions
Correct Answer: ? = A.t. e-E/RT
Correct Answer: 23
Correct Answer: the stagewise uptake of nutrients
Correct Answer: both (a) and (b)
Correct Answer: > 1
Correct Answer: both (a) and (b)
Correct Answer: UV radiation
Correct Answer: increase and the division rate increases to reach a maximum
Correct Answer: Thiaminase
Correct Answer: 5.0 m
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