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BIO NMDCAT Inhibitors
nmdcat.online July 13, 2026

Among the following statements, the most appropriate explanation for decreased enzyme activity after lead exposure is

A. Lead acts as an irreversible inhibitor
✓
B. Lead functions as a coenzyme
C. Lead increases enzyme synthesis
D. Lead converts the substrate into product

📝 Explanation

Heavy metals such as lead commonly inhibit enzymes by binding strongly to functional groups, causing irreversible loss of activity. They neither serve as coenzymes nor enhance enzyme synthesis. Concept tested: Heavy metal inhibition.

📖 Additional Information

  • Lead acts as an irreversible inhibitor
  • Lead functions as a coenzyme
  • Lead increases enzyme synthesis
  • Lead converts the substrate into product

Heavy metals such as lead commonly inhibit enzymes by binding strongly to functional groups, causing irreversible loss of activity. They neither serve as coenzymes nor enhance enzyme synthesis. Concept tested: Heavy metal inhibition.

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