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nmdcat.online July 11, 2026

A certain enzyme has a Km of 10 µM for its substrate. In the presence of an inhibitor, the apparent Km increases to 25 µM, but the Vmax remains unchanged. The inhibitor is most likely a

A. Non-competitive inhibitor
B. Uncompetitive inhibitor
C. Competitive inhibitor
✓
D. Allosteric activator

📝 Explanation

A competitive inhibitor competes for the active site, requiring higher substrate concentrations to reach Vmax, thus increasing apparent Km.

📖 Additional Information

  • Non-competitive inhibitor
  • Uncompetitive inhibitor
  • Competitive inhibitor
  • Allosteric activator

A competitive inhibitor competes for the active site, requiring higher substrate concentrations to reach Vmax, thus increasing apparent Km.

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