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- Question
The relatively large volume (10 to 40% of total fermenter volume) of the seed culture is employed to
Options- A. increase the overall fermentation time
- B. increase the overall yield of biomass
- C. decrease the overall fermentation time
- D. decrease the overall yield of product
- Correct Answer
- decrease the overall fermentation time
- 1. 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
- 2. The rate equation in competitive inhibition based on Michaelis Menten equation is given by
Options- A. rmaxS/(Km (1+I/Ki)+S))
- B. rmaxE/(Km (1+I/Ki)+S))
- C. rmaxI/(Km (1+I/Ki)+S))
- D. rmaxS/(Km (1+I/Ki)) Discuss
- 3. Michaelis Menten equation can also be written as
Options- A. (-Cs)/r = (Cs/rmax)+(Km/rmax)
- B. 1/r = (1/rmax)+(Km/(rmax.Cs))
- C. r = rmax-(Km.r/Cs)
- D. All of these Discuss
- 4. Lock and key theory is based on the compatibility of
Options- A. enzyme and substrate
- B. enzyme and product
- C. enzyme and enzyme substrate complex
- D. enzyme substrate complex and product Discuss
- 5. Classical noncompetitive inhibition is obtained only under
Options- A. slow equilibrium conditions
- B. moderate equilibrium conditions
- C. rapid equilibrium conditions
- D. non-equilibrium conditions Discuss
- 6. In an airlift bioreactor, the air sparging region is called
Options- A. downcomer
- B. disengagement zone
- C. air riser
- D. none of these Discuss
- 7. 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
- 8. 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
- 9. At the end of the lag phase, when growth begins, the division rate increases gradually and reaches a maximum value in the exponential growth period. This transitional period is commonly called the accelerated growth phase and is often included as a part of the
Options- A. lag phase
- B. stationary phase
- C. death phase
- D. exponential growth phase Discuss
- 10. Which of the following(s) is/are considered the limitations of the exponential growth model?
Options- A. Only predicts that cells grow exponentially during the log phase
- B. It does not consider factors that causes cells growth to stop or slow
- C. Predicts cell growth at a linear rate
- D. All of the above Discuss
Fermentation Kinetics problems
Search Results
Correct Answer: acclimatization with new environment and substrate
Correct Answer: rmaxS/(Km (1+I/Ki)+S))
Correct Answer: All of these
Correct Answer: enzyme and substrate
Correct Answer: rapid equilibrium conditions
Correct Answer: air riser
Correct Answer: micro mixing
Correct Answer: the concentration of the substrate that controls the growth rate of the cells
Correct Answer: lag phase
Correct Answer: It does not consider factors that causes cells growth to stop or slow
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