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BIO NMDCAT ENZYMES
nmdcat.online July 11, 2026

The primary function of an isoenzyme, such as lactate dehydrogenase (LDH), in a physiological context is to

A. Catalyze the same reaction but under different kinetic properties or regulatory conditions in different tissues
✓
B. Bind to the same substrate to form different products depending on the organ
C. Act as a competitive inhibitor for the original enzyme
D. Combine several different metabolic pathways into a single rate-limiting step

📝 Explanation

Isoenzymes are multiple forms of an enzyme that catalyze the same reaction but differ in kinetic properties, allowing for tissue-specific metabolic tailoring.

📖 Additional Information

  • Catalyze the same reaction but under different kinetic properties or regulatory conditions in different tissues
  • Bind to the same substrate to form different products depending on the organ
  • Act as a competitive inhibitor for the original enzyme
  • Combine several different metabolic pathways into a single rate-limiting step

Isoenzymes are multiple forms of an enzyme that catalyze the same reaction but differ in kinetic properties, allowing for tissue-specific metabolic tailoring.

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