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BIO NMDCAT Factors that Affect the Rate of Enzyme Reactions
nmdcat.online July 11, 2026

In enzyme kinetics, saturation occurs because

A. Substrate molecules become inactive
B. Every active site is occupied simultaneously
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C. Enzyme molecules become permanently altered
D. Product molecules block all enzymes

📝 Explanation

At saturation, all enzyme molecules are engaged in enzyme-substrate complexes, so increasing substrate concentration no longer increases the reaction rate.

📖 Additional Information

  • Substrate molecules become inactive
  • Every active site is occupied simultaneously
  • Enzyme molecules become permanently altered
  • Product molecules block all enzymes

At saturation, all enzyme molecules are engaged in enzyme-substrate complexes, so increasing substrate concentration no longer increases the reaction rate.

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