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Biochemical Engineering
‣
Fermentation Kinetics
Comments
Question
The maximum specific growth rate (?
m
) of an organism in batch culture is equal to slope of a plot of
Options
A. In [biomass] against time for exponential phase data only
B. In [biomass] against time
C. biomass against time
D. biomass against time for stationary phase data only
Correct Answer
In [biomass] against time for exponential phase data only
Fermentation Kinetics problems
Search Results
1. Diauxie is
Options
A. growth factors
B. microbiological die off
C. the simultaneous uptake of nutrients
D. the stagewise uptake of nutrients
Show Answer
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Discuss
Correct Answer: the stagewise uptake of nutrients
2. A mixed fermentation is one, which produces
Options
A. both alcohol and carbon dioxide
B. both acid and carbon dioxide
C. both acid and alcohol
D. several different kinds of acid
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Correct Answer: both acid and alcohol
3. Which of the following is an example of a mathematical model?
Options
A. Volume of cuboid = length x breadth x height
B. The Monod Model
C. The Michaelis Menten Equation
D. All of the above
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Correct Answer: All of the above
4. The dilution rate, D is defined as(where
F
= volumetric flow rate,
V
R
= total volume of culture in the reactor and ? specific growth rate)
Options
A.
F
/
V
R
B.
V
R
/
F
C. ?/
F
D.
F
/?
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Correct Answer:
F
/
V
R
5. Biomass concentrations during fermentation is
Options
A. diluting the samples to optical density less than 0.3
B. monitored by controlling the changes in biomass concentrations
C. considering that optical density is proportional to the surface area of the biomass in the sample
D. all of the above
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Correct Answer: all of the above
6. The phenomenon in which substrates are used in a sequential manner is known as
Options
A. trans-substrate genesis
B. dialism
C. diauxie
D. multiplicity
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Correct Answer: diauxie
7. An open system in which the growth rate is maintained by the removal and addition of media at such a rate as to maintain a constant cell density is called a
Options
A. manostat
B. chemostat
C. turbidostat
D. culturostat
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Correct Answer: turbidostat
8. In an airlift bioreactor, the spent gases released from the liquid are called
Options
A. downcomer
B. disengagement zone
C. air riser
D. flotsam
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Correct Answer: disengagement zone
9. The function(s) of the draft tube in an airlift bioreactor is
Options
A. to reduce bubble coalescence
B. to improve circulation
C. to even out shear conditions throughout the reactor
D. all of the above
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Correct Answer: all of the above
10. Bubble column reactor has
Options
A. large height to diameter ratio
B. small height to diameter ratio
C. large diameter to height ratio
D. small diameter to height ratio
Show Answer
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Discuss
Correct Answer: large height to diameter ratio
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Enzymes and Kinetics
Fermentation Kinetics
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