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Questions and Answers
What is the role of a cofactor in an enzyme-catalyzed reaction?
What is the role of a cofactor in an enzyme-catalyzed reaction?
- The cofactor binds to the enzyme and prevents the reaction from occurring.
- The cofactor is the substrate that the enzyme acts upon.
- The cofactor is a metal ion or organic molecule that is needed for the enzyme-catalyzed reaction to take place. (correct)
- The cofactor is a byproduct released after the enzyme-catalyzed reaction has occurred.
What is the difference between the lock-and-key model and the induced-fit model of enzyme specificity?
What is the difference between the lock-and-key model and the induced-fit model of enzyme specificity?
- The lock-and-key model states that the enzyme-substrate complex is formed through covalent bonds, while the induced-fit model states that the complex is formed through non-covalent interactions.
- The lock-and-key model states that the substrate must exactly match the shape of the active site, while the induced-fit model states that the active site can adjust to fit a variety of substrate shapes. (correct)
- The lock-and-key model states that the active site is rigid, while the induced-fit model states that the active site is flexible.
- The lock-and-key model states that the enzyme must be activated by a cofactor, while the induced-fit model states that the enzyme can function without a cofactor.
What is the difference between a competitive inhibitor and a noncompetitive inhibitor?
What is the difference between a competitive inhibitor and a noncompetitive inhibitor?
- A competitive inhibitor is a substrate, while a noncompetitive inhibitor is a product of the enzyme-catalyzed reaction.
- A competitive inhibitor increases the enzyme's activity, while a noncompetitive inhibitor decreases the enzyme's activity.
- A competitive inhibitor is reversible, while a noncompetitive inhibitor is irreversible.
- A competitive inhibitor binds to the enzyme's active site, while a noncompetitive inhibitor binds to the enzyme outside of the active site. (correct)
What is the role of zymogens in enzyme regulation?
What is the role of zymogens in enzyme regulation?
How do enzymes function as diagnostic tools?
How do enzymes function as diagnostic tools?
How do enzymes affect the speed of chemical reactions?
How do enzymes affect the speed of chemical reactions?
What is the main function of enzymes?
What is the main function of enzymes?
How do enzymes differ from ordinary reactions?
How do enzymes differ from ordinary reactions?
What suffix is commonly found at the end of enzyme names?
What suffix is commonly found at the end of enzyme names?
Which theory describes enzymes as having high specificity?
Which theory describes enzymes as having high specificity?
What happens to enzymes during catalysis?
What happens to enzymes during catalysis?
Which model or theory provides a simple way of explaining the function of enzymes?
Which model or theory provides a simple way of explaining the function of enzymes?
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