The Cytoplasmic Membrane Cell Integral protein Integral protein membrane Phospholip Peripheral protein Site of biosynthesis of DNA, cell wall polymers and membrane lipids. Selective permeability and transport of solutes into cells Electron transport and oxidative phosphorylation Excretion of hydrolytic exoenzymes Hydrophilic region of protein peptidogl yan outer membrane Phospholi pid Hydrophobic region of protein epiplasm cytoplasm oplasmic membraneCell membrane • Site of biosynthesis of DNA, cell wall polymers and membrane lipids. Selective permeability and transport of solutes into cells • Electron transport and oxidative phosphorylation • Excretion of hydrolytic exoenzymes