Multiple choice

Which of the following statements regarding enzyme inhibition is correct?

  1. Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein.

  2. Non-competitive inhibitors often bind to the enzyme irreversibly.

  3. Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate.

  4. Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme.

  5. Both 3 and 4 are correct.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Competitive inhibition is caused by blocking of active sites of enzyme by an inhibitor that closely resembles with that of the substrate but does not undergo any change.  It is seen when the substrate and the inhibitor compete for the active site on the enzyme.

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