Apoptosis and Its Significance · Zoology

During the execution phase of apoptosis, which enzymes are responsible for the deliberate proteolysis of cellular components?

  1. MMP-9 matrix metalloproteinases
  2. Executioner caspases
  3. Ubiquitin ligases
  4. Internucleosomal endonucleases
Show answer and explanation

Correct answer: Executioner caspases

Caspases are cysteine-aspartic proteases that exist as inactive zymogens. Once activated, executioner caspases (like caspase-3) cleave key structural and regulatory proteins, leading to systematic cell death.

Difficulty: Medium Question 4 of 20

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