The inhibition, in which the inhibitor does not combine directly with the enzyme but binds to the enzyme-substrate complex is called:
Correct answer: D. Uncompetitive inhibition
- A. Reversible inhibition
- B. Competitive inhibition
- C. Non-Competitive inhibition
- D. Uncompetitive inhibition
Explanation
The correct answer is Uncompetitive inhibition. This type of inhibition specifically involves the inhibitor binding to the enzyme-substrate complex, preventing the formation of products. In contrast, Reversible inhibition is a broader category that includes various forms of inhibition not limited to the enzyme-substrate complex. Competitive inhibition is characterized by the inhibitor directly competing with the substrate for the active site, while Non-Competitive inhibition refers to the inhibitor binding to a different site on the enzyme, not the enzyme-substrate complex. Therefore, uncompetitive inhibition is the only option that directly addresses the relationship between the inhibitor and the enzyme-substrate complex.
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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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