<prompt> The metabolically most active plasma lipid is:TriacylglycerolsPhospholipidsFree fatty acidsCholesteryl esters  <response>: Plasma lipids consist of triacylglycerols 16, phospholipids 30, cholesterol 14, and cholesteryl esters 36 and a much smaller fraction of unesterified long-chain fatty acids free fatty acids or FFA 4. This latter fraction, the FFA, is metabolically the most active of the plasma lipids.HARPERS ILLUSTRATED BIOCHEMISTRY30th ed, Page No:254 