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nmdcat.online July 11, 2026

The reason a particular protease enzyme can break peptide bonds but cannot digest starch is that

A. The enzyme is synthesized only in the stomach where starch is not present
B. The active site is structurally and chemically complementary to the peptide bond's transition state, not starch's glycosidic linkage
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C. Protease and amylase are the same enzyme, but the pH alters their specificity
D. Starch molecules are too large to access the enzyme's active site

📝 Explanation

Enzyme specificity results from the chemical complementarity between the active site and the substrate's transition state.

📖 Additional Information

  • The enzyme is synthesized only in the stomach where starch is not present
  • The active site is structurally and chemically complementary to the peptide bond's transition state, not starch's glycosidic linkage
  • Protease and amylase are the same enzyme, but the pH alters their specificity
  • Starch molecules are too large to access the enzyme's active site

Enzyme specificity results from the chemical complementarity between the active site and the substrate's transition state.

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