When an inhibitor binds to an enzyme other than the active site and alters its structure, then it is called:
Correct answer: B. Non-competitive inhibitor
- A. Competitive inhibitor
- B. Non-competitive inhibitor
- C. Reversible inhibitor
- D. Irreversible inhibitor
Explanation
A non-competitive inhibitor is a type of enzyme inhibitor that binds to an enzyme at a location other than the active site. This binding causes a conformational change in the enzyme, reducing its catalytic activity. Non-competitive inhibitors bind to a site on the enzyme that is distinct from the active site. This binding can occur whether or not the substrate is already bound to the enzyme. An example of a non-competitive inhibitor is heavy metal ions that can bind to enzymes, causing a decrease in catalytic activity.
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About Enzymes
Enzymes are biological catalysts that lower activation energy without being consumed, and their specificity is explained by the lock and key and induced fit models. Work includes the effects of temperature, pH and substrate concentration on reaction rate, plus competitive and non-competitive inhibition and how these differ.
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