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Biochemical Engineering
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Fluid Flow
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Question
Which of the following describes the detrimental effect of bubbles on animal cells?
Options
A. Cells trapped on the surface of bubbles can be damaged when the bubbles explode, releasing their pressure and surface energies
B. Cells trapped in the moving foam can be dragged apart by the bubbles
C. Both (a) and (b)
D. Bubbles can explode in the liquid medium causing the release of ultraviolet radiation
Correct Answer
Both (a) and (b)
More questions
1. The water being used in dairy industry should contain not more than
Options
A. 5 proteolytic and/or lipolytic organisms per ml
B. 10 proteolytic and/or lipolytic organisms per ml
C. 15 proteolytic and/or lipolytic organisms per ml
D. 20 proteolytic and/or lipolytic organisms/ml
Show Answer
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Correct Answer: 5 proteolytic and/or lipolytic organisms per ml
2. The initial velocity, V
0
, of an enzyme catalyzed reaction reaches V
max
as
Options
A. [S] = K
M
B. [S] = 10 * K
M
C. 1/[S] = 1/K
M
D. 1/[S] ? 0
Show Answer
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Discuss
Correct Answer: 1/[S] ? 0
3. Predominantly uncompetitive inhibition may be called when
Options
A. competitive inhibition is greater than uncompetitive inhibition
B. competitive inhibition is smaller than uncompetitive inhibition
C. competitive inhibition is equal to uncompetitive inhibition
D. none of the above
Show Answer
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Correct Answer: competitive inhibition is greater than uncompetitive inhibition
4. If a reaction occurs in the absence of inhibitor with rate ?
0
and in the presence of inhibitor with rate ?
i
, the degree of inhibition is defined as
Options
A. (?
0
- ?
i
)/?
0
B. (?
0
+ ?
i
)/?
0
C. (?
0
?
i
)/?
0
D. (?
0
-?
i
)/?
i
Show Answer
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Discuss
Correct Answer: (?
0
- ?
i
)/?
0
5. A classical noncompetitive inhibitor has
Options
A. no effect on substrate binding
B. no effect on substrate binding and vice versa
C. significant effect on substrate binding
D. significant effect on substrate binding and vice versa
Show Answer
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Correct Answer: no effect on substrate binding and vice versa
6. Which of the following step is assumed to be the slowest step in the Michaelis Menten equation?
Options
A. The substrate consuming step
B. The product releasing step
C. Formation of enzyme substrate complex
D. None of these
Show Answer
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Correct Answer: The product releasing step
7. To describe components of an airlift bioreactor which of the follow-ings are generally included?
Options
A. Disengagement zone, air riser, downcomer
B. Flotsam, jetsam, downzone
C. Air comer, disentanglement zone, downsizer
D. All of the above
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Correct Answer: Disengagement zone, air riser, downcomer
8. Detergent like substances produced by microorganisms during a fermentation will lead to
Options
A. decrease the surface tension of the liquid
B. accumulate at the gas liquid interface
C. decrease the rate of bubble coalescence
D. all of the above
Show Answer
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Correct Answer: all of the above
9. Which of the following is incorrect?
Options
A. The mechanical agitation and aeration are effective for suspension of cells
B. The mechanical agitation and aeration are effective for mixing the medium
C. STF can't be used for high viscosity medium
D. The mechanical agitation and aeration are effective for oxygenation
Show Answer
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Correct Answer: STF can't be used for high viscosity medium
10. In the design of a paddle agitator, the ratio of paddle diameter to tank diameter is normally taken as
Options
A. 0.1
B. 0.8
C. 0.25
D. 0.5
Show Answer
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Discuss
Correct Answer: 0.8
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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