200 Best MCQs on Fermentation kinetics- biochemical engineering
Q9). An open system in which the growth rate is maintained by adding a nutrient (present in limiting quantities) at the same rate as that medium containing micro-organisms is removed is called
a).manostat
b).chemostat
c).turbidostat
d).culturostat
Correct Answer:
chemostat
Explaination:
Q10). In the death phase
a).nutrients available for the cells are depleted and begin to die
b).the number of viable cells will increase
c).nutrients available for cells are replenished and start to multiply
d).none of the above
Correct Answer:
nutrients available for the cells are depleted and begin to die
Explaination:
Q11). The maximum specific growth rate of an organism depends on
a).medium composition
b).temperature
c).pH
d).All of these
Correct Answer:
All of these
Explaination:
Q12). Which of the following is not correct for the Monod model and the Michaelis Menten Model?
a).The Michaelis Menten Model was derived from a curve fitting exercise
b).The Michaelis Menten model was derived from an analysis of the mechanism of microbial growth
c).The Monod model was derived from an analysis of the mechanism of microbial growth
d).All of the above
Correct Answer:
The Monod model was derived from an analysis of the mechanism of microbial growth
Explaination:
Q13). Bubble column reactor has
a).large height to diameter ratio
b).small height to diameter ratio
c).large diameter to height ratio
d).small diameter to height ratio
Correct Answer:
large height to diameter ratio
Explaination:
Q14). Why a T-flask used in small-scale cell culture is incubated in a horizontal position?
a).To save space
b).To increase the surface area of the liquid-air interface
c).Both (a) and (b)
d).To increase the rate of oxygen transfer into the liquid
Correct Answer:
Both (a) and (b)
Explaination:
Q15). 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
a).manostat
b).chemostat
c).turbidostat
d).culturostat
Correct Answer:
turbidostat
Explaination:
Q16). Wash out in steady state fermentation occurs when
a).dilution rate is less than maximum specific growth rate
b).dilution rate is higher than the maximum specific growth rate
c).cell concentration reaches the maximum
d).specific growth rate is maximum
Correct Answer:
dilution rate is higher than the maximum specific growth rate
Explaination: