Many modern medicines are designed as competitive inhibitors. To work this way, the drug molecule must

  • A. bind permanently to the enzyme by covalent bonds
  • B. denature the whole protein
  • C. mimic the shape of the enzyme's natural substrate
  • D. block the synthesis of the enzyme

Explanation

A competitive inhibitor succeeds only if it fits the active site, so medicinal chemists build molecules shaped like the substrate. Permanent covalent binding would make the drug an irreversible inhibitor instead, a different mechanism.

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