Q. What is a common microorganism used in fermentation processes?
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A.
Escherichia coli
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B.
Staphylococcus aureus
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C.
Clostridium botulinum
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D.
Bacillus anthracis
Solution
Escherichia coli is commonly used in fermentation processes for protein production and genetic engineering.
Correct Answer:
A
— Escherichia coli
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Q. What is the main advantage of using a fed-batch fermentation process?
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A.
Higher yield
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B.
Lower cost
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C.
Faster fermentation
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D.
Easier to control pH
Solution
The main advantage of fed-batch fermentation is the potential for higher yield due to controlled nutrient addition.
Correct Answer:
A
— Higher yield
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Q. What is the primary purpose of a fermentation reactor?
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A.
To produce antibiotics
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B.
To synthesize proteins
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C.
To facilitate microbial growth
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D.
To extract enzymes
Solution
Fermentation reactors are designed to facilitate microbial growth, allowing for the production of various bioproducts.
Correct Answer:
C
— To facilitate microbial growth
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Q. What is the role of a bioreactor's agitator?
-
A.
To cool the reactor
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B.
To mix the contents
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C.
To sterilize the medium
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D.
To measure pH
Solution
The agitator's role is to mix the contents of the bioreactor, ensuring uniform distribution of nutrients and microorganisms.
Correct Answer:
B
— To mix the contents
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Q. What type of fermentation is primarily anaerobic?
-
A.
Lactic acid fermentation
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B.
Alcoholic fermentation
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C.
Acetic acid fermentation
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D.
All of the above
Solution
All of the listed fermentation types (lactic acid, alcoholic, and acetic acid) are primarily anaerobic processes.
Correct Answer:
D
— All of the above
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Q. Which of the following is NOT a common application of fermentation reactors?
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A.
Beer production
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B.
Insulin production
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C.
Plastic manufacturing
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D.
Yogurt production
Solution
Plastic manufacturing is not a common application of fermentation reactors, which are primarily used for biological processes.
Correct Answer:
C
— Plastic manufacturing
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Q. Which parameter is crucial for optimizing fermentation in reactors?
-
A.
Temperature
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B.
Color
-
C.
Shape
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D.
Size
Solution
Temperature is a crucial parameter that affects microbial metabolism and product yield in fermentation reactors.
Correct Answer:
A
— Temperature
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Q. Which type of fermentation reactor allows for continuous input and output?
-
A.
Batch reactor
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B.
Fed-batch reactor
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C.
Continuous stirred-tank reactor
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D.
Plug flow reactor
Solution
Continuous stirred-tank reactors (CSTR) allow for continuous input and output, maintaining a steady state of operation.
Correct Answer:
C
— Continuous stirred-tank reactor
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