MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
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Correct Answer: D. An inhibitor competes with substrate for the active site
Explanation:
Competitive inhibitors resemble or obstruct the substrate.
Their effect can often be reduced by increasing substrate concentration.
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Correct Answer: A. An inhibitor competes with substrate for the active site
Explanation:
Competitive inhibitors resemble or obstruct the substrate.
Their effect can often be reduced by increasing substrate concentration.
Choose an option to check your answer.
Correct Answer: B. A biological catalyst
Explanation:
Enzymes lower activation energy.
They speed reactions without being consumed overall.
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Correct Answer: B. An inhibitor competes with substrate for the active site
Explanation:
Competitive inhibitors resemble or obstruct the substrate.
Their effect can often be reduced by increasing substrate concentration.
Choose an option to check your answer.
Correct Answer: C. A biological catalyst
Explanation:
Enzymes lower activation energy.
They speed reactions without being consumed overall.
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Correct Answer: C. An inhibitor binds away from the active site and changes enzyme activity
Explanation:
Noncompetitive binding changes enzyme shape or function.
Adding more substrate does not fully overcome it.
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Correct Answer: D. Region where the substrate binds and reaction occurs
Explanation:
The active site has a shape and chemistry suited to its substrate.
Binding promotes the transition state.
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Correct Answer: D. An inhibitor binds away from the active site and changes enzyme activity
Explanation:
Noncompetitive binding changes enzyme shape or function.
Adding more substrate does not fully overcome it.
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Correct Answer: A. Region where the substrate binds and reaction occurs
Explanation:
The active site has a shape and chemistry suited to its substrate.
Binding promotes the transition state.
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Correct Answer: A. An inhibitor binds away from the active site and changes enzyme activity
Explanation:
Noncompetitive binding changes enzyme shape or function.
Adding more substrate does not fully overcome it.
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Correct Answer: B. Region where the substrate binds and reaction occurs
Explanation:
The active site has a shape and chemistry suited to its substrate.
Binding promotes the transition state.
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Correct Answer: B. The cell's main immediate energy-transfer molecule
Explanation:
ATP stores usable energy in phosphate bonds.
Hydrolysis of ATP powers many cellular processes.
