Asked in PMC Practice Test 11 (2021) 2021

The effect of competitive inhibitor on enzyme activity is such that it effects which of the following?

Correct answer: C. Decreases enzyme activity

  • A. Increases enzyme activity
  • B. Doesn't change enzyme activity
  • C. Decreases enzyme activity
  • D. None of these

Explanation

An enzyme inhibitor is a molecule that binds to an enzyme and blocks its activity. Enzymes are proteins that speed up chemical reactions necessary for life, in which substrate molecules are converted into products.Competitive inhibition is the interruption of a chemical pathway owing to one chemical substance inhibiting the effect of another by competing with it for binding or bonding.

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About Enzyme Inhibitors

Enzyme inhibitors reduce reaction rate by interfering with enzyme-substrate interaction or catalytic activity. Coverage includes reversible competitive, non-competitive and uncompetitive inhibition, the effects of inhibitor concentration on reaction rate, and why competitive inhibition can be reduced by increasing substrate concentration.

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633 free Enzymes MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.

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