BIO NMDCAT Cytoplasmic Organelles
nmdcat.online July 4, 2026

40. The biochemical assembly of new cellular lipid bilayers takes place on the

A. Luminal face of the rough ER
B. Cytosolic face of the smooth ER
C. Interior matrix of the mitochondria
D. Exoplasmic leaflet of the Golgi

📝 Explanation

The active sites of lipid synthesis enzymes face the cytosol, adding new lipid molecules directly to the cytosolic leaflet of the SER.

📖 Additional Information

  • Luminal face of the rough ER
  • Cytosolic face of the smooth ER
  • Interior matrix of the mitochondria
  • Exoplasmic leaflet of the Golgi

The active sites of lipid synthesis enzymes face the cytosol, adding new lipid molecules directly to the cytosolic leaflet of the SER.

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