Q. What is an enzyme's active site?
-
A.
The part that binds to substrates
-
B.
The part that provides energy
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C.
The part that stabilizes the enzyme
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D.
The part that transports products
Solution
The active site is the region of the enzyme where substrate molecules bind and undergo a chemical reaction.
Correct Answer:
A
— The part that binds to substrates
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Q. What is enzyme inhibition?
-
A.
The process of activating an enzyme
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B.
The process of increasing substrate concentration
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C.
The process of decreasing enzyme activity
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D.
The process of stabilizing enzyme structure
Solution
Enzyme inhibition refers to the process that decreases enzyme activity, which can occur through various mechanisms.
Correct Answer:
C
— The process of decreasing enzyme activity
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Q. What is the effect of temperature on enzyme activity?
-
A.
Increases indefinitely
-
B.
Decreases indefinitely
-
C.
Increases to an optimal point then decreases
-
D.
Has no effect
Solution
Enzyme activity typically increases with temperature to an optimal point, after which it decreases due to denaturation.
Correct Answer:
C
— Increases to an optimal point then decreases
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Q. What is the primary function of enzymes in the human body?
-
A.
To provide energy
-
B.
To catalyze biochemical reactions
-
C.
To transport oxygen
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D.
To store nutrients
Solution
Enzymes act as catalysts that speed up biochemical reactions without being consumed in the process.
Correct Answer:
B
— To catalyze biochemical reactions
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Q. What is the role of coenzymes in enzymatic reactions?
-
A.
To inhibit enzyme activity
-
B.
To provide additional energy
-
C.
To assist in substrate binding
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D.
To stabilize the enzyme structure
Solution
Coenzymes are organic molecules that assist enzymes by helping to bind substrates and facilitate reactions.
Correct Answer:
C
— To assist in substrate binding
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Q. Which enzyme is commonly used in the treatment of pancreatitis?
-
A.
Amylase
-
B.
Lipase
-
C.
Trypsin
-
D.
Chymotrypsin
Solution
Lipase is often used in the treatment of pancreatitis to help digest fats when the pancreas is not functioning properly.
Correct Answer:
B
— Lipase
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Q. Which enzyme is responsible for breaking down lactose into glucose and galactose?
-
A.
Amylase
-
B.
Lactase
-
C.
Protease
-
D.
Lipase
Solution
Lactase is the enzyme that catalyzes the hydrolysis of lactose into glucose and galactose.
Correct Answer:
B
— Lactase
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Q. Which of the following factors can affect enzyme activity?
-
A.
pH levels
-
B.
Temperature
-
C.
Substrate concentration
-
D.
All of the above
Solution
All of the listed factors can influence enzyme activity by affecting the enzyme's structure and function.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common application of enzymes in industry?
-
A.
Baking
-
B.
Textile processing
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C.
Biofuel production
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D.
All of the above
Solution
Enzymes are widely used in various industries, including baking, textile processing, and biofuel production, for their catalytic properties.
Correct Answer:
D
— All of the above
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