What is the primary role of lipoprotein lipase in lipid metabolism?

• A. To transport lipids to the liver
• B. To break down triglycerides in chylomicrons
• C. To convert VLDL to LDL
• D. To remove cholesterol from cells

Answer: (B)

The primary role of lipoprotein lipase in lipid metabolism is to break down triglycerides in chylomicrons. This enzyme is crucial for the hydrolysis of triglycerides into free fatty acids and glycerol, allowing these components to be taken up by surrounding tissues, such as adipose tissue and muscle. By facilitating the breakdown of triglycerides, lipoprotein lipase enables the storage of energy and the use of fatty acids for energy production.

Chylomicrons, which are formed in the intestinal lining after the ingestion of fats, carry dietary triglycerides through the lymphatic system and into the bloodstream. Lipoprotein lipase acts at the endothelial surface of capillaries in various tissues to ensure these triglycerides are effectively utilized or stored. This process plays a significant role in overall lipid metabolism and homeostasis.

The other options describe different processes and functions in lipid metabolism that do not accurately represent the primary action of lipoprotein lipase. Transporting lipids to the liver, converting VLDL to LDL, and removing cholesterol from cells pertain to other enzymes and mechanisms involved in lipid transport, synthesis, and regulation.