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BIO NMDCAT Cytoplasmic Organelles
nmdcat.online July 4, 2026

73. A key biochemical characteristic that distinguishes the outer mitochondrial membrane from the inner membrane is the presence of large channel-forming proteins called

A. Aquaporins
B. Porins
✓
C. Connexins
D. Ribophorins

📝 Explanation

Porins render the outer membrane freely permeable to small molecules and metabolic substrates, unlike the highly selective inner membrane.

📖 Additional Information

  • Aquaporins
  • Porins
  • Connexins
  • Ribophorins

Porins render the outer membrane freely permeable to small molecules and metabolic substrates, unlike the highly selective inner membrane.

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