The answer is Lipids.
Lipids are biomolecules, made up of glycerol and fatty acid molecules. In general terms lipid are called fat. Lipids are soluble in non polar solvents. Steroids and phospholipids are examples of lipids. Mainly, lipids acts as the structural component of lipid bilayer. The other functions of lipids are to store energy and signaling. many signalling hormones are made up of steroids.
