17. What is a fatty acid donor for LCAT?(specify one or more answers) HDL triacylglycerols free fatty acid HDL phosphatidylcholine cell membranes phospholipids VLDL triacylglycerols

The correct answer is HDL phosphatidylcholine.<br /><br />Lipoprotein lipase (LCAT) is an enzyme that plays a crucial role in the metabolism of lipoproteins, which are particles that transport lipids () in the blood. LCAT catalyzes the transfer of fatty acids from the phosphatidylcholine molecule in the core of high-density lipoprotein (HDL) particles to the free fatty acid pool in the blood. This process is known as acylation and it helps to maintain the balance of fatty acids in the body.<br /><br />HDL phosphatidylcholine serves as a fatty acid donor for LCAT. The fatty acid residues attached to the phosphatidylcholine molecule in the HDL particle are transferred to the free fatty acid pool in the blood, which can then be taken up by cells and used for energy production or other metabolic processes.