PMB addresses allow small businesses to have a professional-looking street address, have someone available during regular delivery hours to sign for letters or packages, pick up the mail at convenient hours, and retain privacy, which can be important for the owners of home-based businesses.
The main â¦ functions of lipids are energy storage, as structural components of cell membranes, and as important signaling molecules.ipids have six major functions. They store energy, they are a  shock absorber, they are structural components in cell membranes,  they are precursors of hormones, they are â¦ insulation, and they aid  in the absorption of vitamins.
Introduction and overview. Lipids as a class of molecules display a wide diversity in both structure and biological. function. A primary role of lipids in cellular function is in the formation of the. permeability barrier of cells and subcellular organelles in the form of a lipid bilayer. (Fig. 1). Although the major lipid type defining this bilayer in almost all membranes.