Which cell component is commonly associated with lipid synthesis and detoxification in many cells?

Which cell component is commonly associated with lipid synthesis and detoxification in many cells?

• A. Mitochondrion
• B. Peroxisome
• C. Smooth Endoplasmic Reticulum
• D. Ribosome

Answer: (C)

Smooth endoplasmic reticulum handles lipid synthesis and detoxification. It forms a network of tubules that lack ribosomes, setting it apart from the rough ER. Enzymes in the smooth ER build phospholipids and cholesterol for membranes, and in many cells—especially liver cells—it also metabolizes and detoxifies lipophilic compounds, making them easier to eliminate. While mitochondria are the energy factories of the cell and peroxisomes participate in fatty acid metabolism and some detox tasks, the combination of lipid biosynthesis and detox pathways is the hallmark of the smooth ER. Ribosomes, on the other hand, are the sites of protein synthesis, not lipid production or detoxification.

Smooth endoplasmic reticulum handles lipid synthesis and detoxification. It forms a network of tubules that lack ribosomes, setting it apart from the rough ER. Enzymes in the smooth ER build phospholipids and cholesterol for membranes, and in many cells—especially liver cells—it also metabolizes and detoxifies lipophilic compounds, making them easier to eliminate. While mitochondria are the energy factories of the cell and peroxisomes participate in fatty acid metabolism and some detox tasks, the combination of lipid biosynthesis and detox pathways is the hallmark of the smooth ER. Ribosomes, on the other hand, are the sites of protein synthesis, not lipid production or detoxification.