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- Question
During the exponential phase the maximum specific growth rate equals specific growth rate as
Options- A. concentration of the growth limiting substrate is much less than the monod constant
- B. concentration of growth limiting substrate is much greater than the monod constant
- C. specific growth rate increases exponentially
- D. concentration of the growth limiting substrate is equal to the monod constant
- Correct Answer
- concentration of growth limiting substrate is much greater than the monod constant
- 1. The specific growth rate (?) is defined as
Options- A. the concentration of biomass in the reactor
- B. rate of increase of total biomass in a reactor
- C. the rate of individual cells division or increase in their biomass
- D. the rate of cell death Discuss
- 2. The monod model predicts that the specific growth rate
Options- A. will increase with the concentration of the growth limiting substrate until it reaches a maximum value
- B. will decrease with the concentration of the growth limiting substrate
- C. will increase with the concentration of the growth limiting substrate
- D. does not depend on growth limiting substrate Discuss
- 3. Population doubling time, td can be expressed as (where ? is the specific growth rate.)
Options- A. log2/?
- B. ln2/?
- C. ?/ln2
- D. ?/log2 Discuss
- 4. Chemostats work on the principle of
Options- A. maintaining constant volume of culture medium
- B. maintaining continuous flow of nutrients
- C. maintaining uniform nutrients concentration
- D. operating at higher pressure Discuss
- 5. The function of the disengagement zone in an airlift fermenter is to
Options- A. prevent CO2 rich bubbles from entering the downcomer
- B. reduce the velocity of the bubbles
- C. reduce liquid loss as aerosols
- D. all of the above 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. The Monod Model relates
Options- A. substrate utilized with the biomass consumption
- B. specific growth rate to the substrate availability
- C. yield with the biomass utilization
- D. the biomass concentration with specific growth rate Discuss
- 8. Which of the following describes the detrimental effect of bubbles on animal cells?
Options- A. Cells trapped on the surface of bubbles can be damaged when the bubbles explode, releasing their pressure and surface energies
- B. Cells trapped in the moving foam can be dragged apart by the bubbles
- C. Both (a) and (b)
- D. Bubbles can explode in the liquid medium causing the release of ultraviolet radiation Discuss
- 9. Water is a
Options- A. newtonian fluid
- B. pseudoplastic
- C. dilatant
- D. rheopectic Discuss
- 10. A Newtonian fluid is one in which the viscosity
Options- A. is constant regardless of the stirrer speed or mixing time
- B. changes during mixing but returns to its original state after mixing
- C. increases with increasing stirrer speed
- D. decreases with increasing stirrer speed Discuss
Fermentation Kinetics problems
Search Results
Correct Answer: the rate of individual cells division or increase in their biomass
Correct Answer: will increase with the concentration of the growth limiting substrate until it reaches a maximum value
Correct Answer: ln2/?
Correct Answer: maintaining uniform nutrients concentration
Correct Answer: all of the above
Correct Answer: both (a) and (b)
Correct Answer: specific growth rate to the substrate availability
Correct Answer: Both (a) and (b)
Correct Answer: newtonian fluid
Correct Answer: is constant regardless of the stirrer speed or mixing time
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