An inhibitor is added, disrupting the function of a particular enzyme. The experimenter adds more substrate, and enzyme function increases again. These results indicate the involvement of what type of inhibitor?
Correct answer: D. Competitive
- A. Noncompetitive
- B. Uncompetitive
- C. Allosteric
- D. Competitive
Explanation
Competitive inhibitors bind to the active site of the enzyme. Therefore, increasing the amount of substrate increases the chance of substrate binding to the active site and forming enzyme-substrate complexes, so that fewer inhibitors can bind.
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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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