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Discussion
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Biochemical Engineering
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Agitation and Aeration
See What Others Are Saying!
Question
Which of the following will have the highest surface area available for oxygen transfer?
Options
A. A shake flask
B. A standing test tube
C. A non-sparged stirred tank reactor agitated at 400 rpm
D. A sparged stirred tank reactor agitated at 400 rpm
Correct Answer
A sparged stirred tank reactor agitated at 400 rpm
More questions
1. Which of the following affect the Kolmogorov eddy size?
Options
A. Stirrer speed
B. Physical properties of the liquid
C. Size and type of impeller
D. All of these
Show Answer
Scratch Pad
Discuss
Correct Answer: All of these
2. The mechanical means of accomplishing sterilization of fermentation media/equipment is
Options
A. ultrasonic
B. radiation
C. chemical agents
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer: ultrasonic
3. A noncompetitive inhibitor of an enzyme-catalyzed reaction
Options
A. increases
K
M
and increases V
max
B. increases
K
M
and reduces V
max
C. reduces
K
M
and increases V
max
D. reduces
K
M
and reduces V
max
Show Answer
Scratch Pad
Discuss
Correct Answer: increases
K
M
and reduces V
max
4. Which of the following statement(s) regarding enzymes, is/are false?
Options
A. Enzymes are always proteins that function as catalysts
B. Enzymes provide activation energy for reactions
C. Enzyme activity can be regulated
D. Enzymes may be used many times for a specific reaction
Show Answer
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Discuss
Correct Answer: Enzymes provide activation energy for reactions
5. The Monod Model relates
Options
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
Show Answer
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Discuss
Correct Answer: specific growth rate to the substrate availability
6. The advantage of axial flow impellers over radial flow impellers is that axial flow impellers
Options
A. provide better lift of solids
B. provide high shear conditions
C. provide low shear conditions
D. are cheaper to build
Show Answer
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Discuss
Correct Answer: provide better lift of solids
7. Which is not the method for producing immobilized enzymes with multifunctional reagents?
Options
A. Enzymes are adsorbed on the surface active support followed by intermolecular cross linking
B. Functional groups are introduced on the support to react co-valently with enzymes
C. Enzymes are cross linked intermolecularly
D. None of the above
Show Answer
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Discuss
Correct Answer: None of the above
8. Conventional tertiary treatment is
Options
A. chemical coagulation and flocculation
B. filtration
C. sedimentation
D. none of these
Show Answer
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Discuss
Correct Answer: chemical coagulation and flocculation
9. The bitter taste of the high protein materials is reduced by using
Options
A. invertase
B. dectinase
C. protease
D. none of these
Show Answer
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Discuss
Correct Answer: protease
10. The ultimate source of water is
Options
A. rivers and lakes
B. dew and forest
C. rain and snow
D. underground and surface
Show Answer
Scratch Pad
Discuss
Correct Answer: rain and snow
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More in Biochemical Engineering:
Agitation and Aeration
Downstream Processing
Enzymes and Application
Enzymes and Kinetics
Fermentation Kinetics
Fermentation Reactors
Fluid Flow
Immobilized Enzyme
Sterilization
Water Treatment