In uncompetitive inhibition, the inhibitor binds with ----------
Correct answer: C. ES complex
- A. Enzyme
- B. Substrate
- C. ES complex
- D. All of these
Explanation
Option C is correct since uncompetitive inhibition occurs when an inhibitor binds to an allosteric site of an enzyme, but only when the substrate is already bound to the active site. In other words, an uncompetitive inhibitor can only bind to the enzyme-substrate complexOption A is incorrect because uncompetitive inhibitors do not bind to free enzymes.Option B is incorrect because inhibitors do not bind to the substrate but to the enzymes. The substrate is thereby prevented from binding to the enzyme.Option D is incorrect because uncompetitive inhibitors bind to the enzyme-substrate complex only.
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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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