200 Best MCQs on Fermentation kinetics- biochemical engineering
Q25). The maximum specific growth rate (μm) of an organism in batch culture is equal to slope of a plot of
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
Explaination:
Q26). The region of an airlift bioreactor in which the liquid travels in a downward direction is called the
a).downcomer
b).disengagement zone
c).air riser
d).flotsam
Correct Answer:
downcomer
Explaination:
Q27). Population doubling time, td can be expressed as (where μ is the specific growth rate.)
a).log2/μ
b).ln2/μ
c).μ/ln2
d).μ/log2
Correct Answer:
ln2/μ
Explaination:
Q28). A higher Ks value of Monod’s equation means
a).greater affinities to substrate
b).lower affinities to substrate
c).unaffected with the substrate bonding
d).lower dissociation constant value
Correct Answer:
greater affinities to substrate
Explaination:
Q29). The increased air flow rate in bubble column fermenter can cause excessive foaming and high retention of air bubbles in the column which
a).decreases the productivity of the fermenter
b).increases the productivity of the fermenter
c).modestly increases the productivity of the fermenter
d).does not affect on the productivity
Correct Answer:
decreases the productivity of the fermenter
Explaination:
Q30). Which of the following is correct for the prediction of time requirement in a batch fermenter?
a).Carrying out experiments
b).Mathematical modelling of the fermentation process
c).Both (a) and (b)
d).It is impossible to predict the time required for fermentation
Correct Answer:
Both (a) and (b)
Explaination:
Q31). In an airlift bioreactor, the spent gases released from the liquid are called
a).downcomer
b).disengagement zone
c).air riser
d).flotsam
Correct Answer:
disengagement zone
Explaination:
Q32). The contents in jet loop reactor are mixed through
a).compressed air
b).a mechanical agitator
c).external pumping
d).any of these
Correct Answer:
external pumping
Explaination: