HUMAN NUTRITION

Detailed explanation-1: -Another major characteristic that differentiates the lipids from other macromolecules is their hydrophobicity. The lipids contain diverse groups of naturally occurring compounds like vitamins, sterol, waxes, etc all these are insoluble in water.

Detailed explanation-2: -Due to the numerous nonpolar covalent bonds that comprise lipids, lipids are generally considered hydrophobic. Many cellular lipids contain molecules known as fatty acids: extended hydrocarbon chains with a carboxyl group (-COOH) at one end. The hydrocarbon chains of fatty acids are nonpolar and hydrophobic.

Detailed explanation-3: -All of the lipid molecules in cell membranes are amphipathic (or amphiphilic)-that is, they have a hydrophilic (“water-loving”) or polar end and a hydrophobic (“water-fearing”) or nonpolar end. The most abundant membrane lipids are the phospholipids. These have a polar head group and two hydrophobic hydrocarbon tails.