Q. What effect does increasing temperature generally have on protein stability?
-
A.
Increases stability
-
B.
Decreases stability
-
C.
No effect
-
D.
Depends on the protein
Solution
Increasing temperature typically decreases protein stability due to denaturation.
Correct Answer:
B
— Decreases stability
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Q. What is the effect of pH on protein stability?
-
A.
Only affects solubility
-
B.
Can lead to denaturation
-
C.
Has no effect
-
D.
Only affects enzymatic activity
Solution
pH can lead to denaturation, affecting protein stability and function.
Correct Answer:
B
— Can lead to denaturation
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Q. What is the primary consequence of protein denaturation?
-
A.
Loss of function
-
B.
Increased solubility
-
C.
Enhanced stability
-
D.
No change in activity
Solution
Denaturation typically results in a loss of protein function.
Correct Answer:
A
— Loss of function
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Q. What is the primary factor that affects protein stability in a cellular environment?
-
A.
Temperature
-
B.
pH level
-
C.
Ionic strength
-
D.
All of the above
Solution
All of the above factors can significantly influence protein stability.
Correct Answer:
D
— All of the above
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Q. What role do chaperone proteins play in protein stability?
-
A.
They degrade misfolded proteins
-
B.
They assist in proper folding
-
C.
They enhance enzymatic activity
-
D.
They transport proteins
Solution
Chaperone proteins assist in the proper folding of other proteins, enhancing their stability.
Correct Answer:
B
— They assist in proper folding
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Q. Which condition can lead to protein aggregation and loss of function?
-
A.
High salt concentration
-
B.
Low pH
-
C.
High temperature
-
D.
All of the above
Solution
All of these conditions can lead to protein aggregation and loss of function.
Correct Answer:
D
— All of the above
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Q. Which of the following can stabilize protein structures?
-
A.
Salt bridges
-
B.
Hydrophobic interactions
-
C.
Van der Waals forces
-
D.
All of the above
Solution
All of these interactions contribute to the stabilization of protein structures.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common method to enhance protein stability in pharmaceuticals?
-
A.
Lyophilization
-
B.
Chemical modification
-
C.
Use of stabilizers
-
D.
All of the above
Solution
All of these methods are used to enhance protein stability in pharmaceutical formulations.
Correct Answer:
D
— All of the above
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Q. Which structural feature is most critical for the stability of enzymes?
-
A.
Active site configuration
-
B.
Hydrophobic core
-
C.
Disulfide bonds
-
D.
All of the above
Solution
All of these features contribute to the stability of enzymes.
Correct Answer:
D
— All of the above
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Q. Which type of bond is primarily responsible for maintaining the tertiary structure of proteins?
-
A.
Hydrogen bonds
-
B.
Ionic bonds
-
C.
Disulfide bridges
-
D.
All of the above
Solution
Tertiary structure is stabilized by hydrogen bonds, ionic bonds, and disulfide bridges.
Correct Answer:
D
— All of the above
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