Q.Lipids associated with cell membrane are ------------.

A phospholipid is a compound lipid built from one glycerol molecule, two fatty-acid chains, and a phosphate group (some, like lecithin, also carry a nitrogenous group attached to the phosphate). This structure gives phospholipids a dual, amphipathic character: a hydrophilic polar head (the phosphate/nitrogenous portion) and a hydrophobic non-polar tail (the two fatty-acid hydrocarbon chains). In water, phospholipid molecules spontaneously arrange themselves into a lipid bilayer — two layers with polar heads facing the surrounding water on both surfaces and non-polar tails buried together in the middle, away from water. This bil …