Q. In which application are immobilized enzymes commonly used?
A.
Biosensors
B.
Drug synthesis
C.
Food processing
D.
All of the above
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Solution
Immobilized enzymes are used in various applications, including biosensors, drug synthesis, and food processing.
Correct Answer:
D
— All of the above
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Q. What effect does temperature have on immobilized enzyme activity?
A.
No effect
B.
Increases activity at all temperatures
C.
Can denature the enzyme at high temperatures
D.
Only affects free enzymes
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Solution
Temperature can significantly affect immobilized enzyme activity, potentially leading to denaturation at high temperatures.
Correct Answer:
C
— Can denature the enzyme at high temperatures
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Q. What is an immobilized enzyme?
A.
An enzyme that is free in solution
B.
An enzyme that is attached to a solid support
C.
An enzyme that is inactive
D.
An enzyme that is produced in large quantities
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Solution
An immobilized enzyme is one that is attached to a solid support, which allows for easier separation from the reaction mixture.
Correct Answer:
B
— An enzyme that is attached to a solid support
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Q. What is one advantage of using immobilized enzymes in industrial processes?
A.
Higher enzyme activity
B.
Easier enzyme recovery
C.
Lower production costs
D.
Increased substrate specificity
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Solution
One advantage of using immobilized enzymes is easier enzyme recovery, which simplifies the purification process after the reaction.
Correct Answer:
B
— Easier enzyme recovery
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Q. What is the primary purpose of immobilizing enzymes?
A.
To increase their solubility
B.
To enhance their stability and reusability
C.
To decrease their activity
D.
To change their substrate specificity
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Solution
The primary purpose of immobilizing enzymes is to enhance their stability and reusability in various applications.
Correct Answer:
B
— To enhance their stability and reusability
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Q. What is the role of a carrier in enzyme immobilization?
A.
To increase enzyme activity
B.
To provide a surface for enzyme attachment
C.
To decrease reaction time
D.
To enhance substrate binding
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Solution
The role of a carrier in enzyme immobilization is to provide a surface for enzyme attachment, facilitating the immobilization process.
Correct Answer:
B
— To provide a surface for enzyme attachment
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Q. Which of the following is a common method for enzyme immobilization?
A.
Gel filtration
B.
Covalent bonding
C.
Dialysis
D.
Precipitation
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Solution
Covalent bonding is a common method for immobilizing enzymes, allowing them to remain attached to a support while retaining activity.
Correct Answer:
B
— Covalent bonding
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Q. Which of the following is a disadvantage of immobilized enzymes?
A.
Increased stability
B.
Higher operational costs
C.
Reduced enzyme activity
D.
Easier handling
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Solution
A disadvantage of immobilized enzymes can be reduced enzyme activity due to steric hindrance or changes in the enzyme's conformation.
Correct Answer:
C
— Reduced enzyme activity
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Q. Which of the following is NOT a factor affecting the activity of immobilized enzymes?
A.
pH
B.
Temperature
C.
Enzyme concentration
D.
Support material
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Solution
While pH, temperature, and support material affect the activity of immobilized enzymes, enzyme concentration is typically controlled in the reaction mixture.
Correct Answer:
C
— Enzyme concentration
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Q. Which type of support is commonly used for enzyme immobilization?
A.
Cellulose
B.
Silica gel
C.
Polyacrylamide
D.
All of the above
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Solution
All of the mentioned supports, including cellulose, silica gel, and polyacrylamide, are commonly used for enzyme immobilization.
Correct Answer:
D
— All of the above
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