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BIO NMDCAT ENZYMES
nmdcat.online July 11, 2026

A graph of reaction rate versus substrate concentration for an enzyme-catalyzed reaction shows a hyperbolic curve because

A. Enzyme molecules become denatured at high substrate concentrations
B. Substrate molecules inhibit the reaction after a certain point
C. The enzyme becomes saturated, and all active sites are occupied
✓
D. The activation energy increases exponentially with substrate concentration

📝 Explanation

At high substrate concentrations, all enzyme active sites are occupied. The reaction velocity reaches a maximum (Vmax), and further substrate addition cannot increase the rate.

📖 Additional Information

  • Enzyme molecules become denatured at high substrate concentrations
  • Substrate molecules inhibit the reaction after a certain point
  • The enzyme becomes saturated, and all active sites are occupied
  • The activation energy increases exponentially with substrate concentration

At high substrate concentrations, all enzyme active sites are occupied. The reaction velocity reaches a maximum (Vmax), and further substrate addition cannot increase the rate.

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