200 Best MCQs on Fermentation kinetics- biochemical engineering

Q33). The specific growth rate (μ) is defined as

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

Correct Answer:
the rate of individual cells division or increase in their biomass
Explaination:

Q34). The number of baffles in a standard stirred tank bioreactor is

a).8
b).6
c).4
d).2

Correct Answer:
4
Explaination:

Q35). In the stationary phase

a).growth is proportional to death
b).growth rate is equal to death rate
c).growth rate is lesser than death rate
d).no co-relation exist between death rate and growth rate

Correct Answer:
growth rate is equal to death rate
Explaination:

Q36). Which of the following is an example of a mathematical model?

a).Volume of cuboid = length x breadth x height
b).The Monod Model
c).The Michaelis Menten Equation
d).All of the above

Correct Answer:
All of the above
Explaination:

Q37). Biomass concentrations during fermentation is

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

Correct Answer:
all of the above
Explaination:

Q38). Chemostats work on the principle of

a).maintaining constant volume of culture medium
b).maintaining continuous flow of nutrients
c).maintaining uniform nutrients concentration
d).operating at higher pressure

Correct Answer:
maintaining uniform nutrients concentration
Explaination:

Q39). During the exponential phase the maximum specific growth rate equals specific growth rate as

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
Explaination:

Q40). An internal draft tube is preferrred to an external draft tube because

a).it is easier to clean and sterilize a reactor
b).it is cheaper to build a reactor with an internal draft tube
c).Both (a) and (b)
d).none of the above

Correct Answer:
it is easier to clean and sterilize a reactor
Explaination: