Biochemical Engineering

Question: 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

Answer: Option C

Explanation:

No answer description available for this question.

Question: The monod model predicts that the specific growth rate
[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

Answer: Option A

Explanation:

No answer description available for this question.

Question: 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

Answer: Option C

Explanation:

No answer description available for this question.

Question: In a batch reactor specific growth rate
[A].

remains constant throughout the process

[B].

increases exponentially

[C].

changes during the fermentation

[D].

is highest during the stationary phase

Answer: Option C

Explanation:

No answer description available for this question.

Question: The maximum specific growth rate of an organism depends on
[A].

medium composition

[B].

temperature

[C].

pH

[D].

All of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: The Monod Model relates
[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

Answer: Option B

Explanation:

No answer description available for this question.

Question: At the end of the lag phase, when growth begins, the division rate increases gradually and reaches a maximum value in the exponential growth period. This transitional period is commonly called the accelerated growth phase and is often included as a part of the
[A].

lag phase

[B].

stationary phase

[C].

death phase

[D].

exponential growth phase

Answer: Option A

Explanation:

No answer description available for this question.

Question: Concentration of the growth limiting substrate means
[A].

trace elements concentration

[B].

the concentration of the substrate that controls the growth rate of the cells

[C].

sugar concentration in the fermentation medium

[D].

dissolved oxygen concentration

Answer: Option B

Explanation:

No answer description available for this question.

Question: The specific growth rate is affected by
[A].

sabstrate concentration

[B].

product concentration

[C].

oxygen supply

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: 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

Answer: Option C

Explanation:

No answer description available for this question.