Enzymes: Classification, Kinetics and Inhibition · Zoology

Allosteric enzymes differ from Michaelis-Menten enzymes because they:

  1. Have a single active site only
  2. Follow hyperbolic kinetics
  3. Show sigmoidal kinetics
  4. Lack any regulatory sites
Show answer and explanation

Correct answer: Show sigmoidal kinetics

Allosteric enzymes exhibit sigmoidal (S-shaped) substrate saturation kinetics due to cooperative binding — binding of one substrate molecule increases affinity at remaining subunits. They possess separate regulatory sites that modulate activity through conformational changes.

Difficulty: Medium Question 17 of 20

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