Biochemical Engineering | Fermentation Reactors

When two populations compete for a single growth limiting substrate in a continuous fermenter, which organism would not be washed out?

Byadmin July 20, 2022

Question: When two populations compete for a single growth limiting substrate in a continuous fermenter, which organism would not be washed out?
[A].

Organism maintaining the highest substrate concentration

[B].

Organism maintaining the lowest substrate concentration

[C].

Both (a) and (b)

[D].

Organism maintaining the moderate substrate concentration

Answer: Option B

Explanation:

No answer description available for this question.

Agitation And Aeration | Biochemical Engineering

Which of the following type(s) of stirrer can be used for microbiological processes?

Question: Which of the following type(s) of stirrer can be used for microbiological processes?
[A].

Mig
[B].
Intermig
[C].
Turbine
[D].
All of these

Answer: Option D

Explanation:

No answer description available for this question.

Read More Which of the following type(s) of stirrer can be used for microbiological processes?
Biochemical Engineering | Fermentation Kinetics

During the lag phase

Question: During the lag phase
[A].

cells just start growing
[B].
cells synthesize new proteins and membrane components
[C].
cells produce antibiotics to kill competing organisms
[D].
cells simply grow slowly

Answer: Option B

Explanation:

No answer description available for this question.

Read More During the lag phase
Biochemical Engineering | Immobilized Enzyme

Which of the following is taken as an assumption in the distributed model?

Question: Which of the following is taken as an assumption in the distributed model?
[A].

The reaction occurs at every position and the kinetics of the reaction are of the same form as observed for free enzyme.
[B].
Mass transfer through the immobilized enzyme occurs via molecular diffusion
[C].
There is no mass transfer limitation at the outside surface of the spherical immobilized enzyme
[D].
All of the above

Answer: Option D

Explanation:

No answer description available for this question.

Read More Which of the following is taken as an assumption in the distributed model?
Biochemical Engineering | Enzymes And Kinetics

Which of the following common drugs is not a specific enzyme inhibitor?

Question: Which of the following common drugs is not a specific enzyme inhibitor?
[A].

Iodine
[B].
Methotrexate
[C].
Sulfbnilamide
[D].
Penicillin

Answer: Option A

Explanation:

No answer description available for this question.

Read More Which of the following common drugs is not a specific enzyme inhibitor?
Agitation And Aeration | Biochemical Engineering

Which of the following best explains the reasons for using axial flow impellers in crystallization and precipitation reactions?

Question: Which of the following best explains the reasons for using axial flow impellers in crystallization and precipitation reactions?
[A].

Crystal and precipitates are not too small, so as to ensure easy separation of the solids from the mother liquor
[B].
Crystals and precipitates are thoroughly broken down, so as to ensure easy separation of the solids from the mother liquor
[C].
Both (a) and (b)
[D].
Axial flow impellers provide low shear, energy efficient mixing conditions

Answer: Option A

Explanation:

No answer description available for this question.

Read More Which of the following best explains the reasons for using axial flow impellers in crystallization and precipitation reactions?
Agitation And Aeration | Biochemical Engineering

Reynolds (Rei) number for the impeller is given by (where Di, stirrer diameter; N, stirrer speed, ρ, density of fluid and μ, viscosity of fluid)

Question: Reynolds (Rei) number for the impeller is given by (where Di, stirrer diameter; N, stirrer speed, ρ, density of fluid and μ, viscosity of fluid)
[A].

DiVρ/μ
[B].
Di2Nρ/μ
[C].
Di2Vρ/μ
[D].
DiNρ /μ

Answer: Option B

Explanation:

No answer description available for this question.

Read More Reynolds (Rei) number for the impeller is given by (where Di, stirrer diameter; N, stirrer speed, ρ, density of fluid and μ, viscosity of fluid)

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