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The two sides of the plasma membrane have different lipid and protein composition. EXPLANATION: Because the membrane serves different functions on the cytoplasmic and exterior surfaces, the structure and composition of the surfaces must be different. 2 Which of the following best describes the structure of a biological membrane? two layers of phospholipids with proteins either crossing the layers or on the surface of the layers explanation:
Let's discuss one very important class of molecules for biological processes: lipids. Lipids are characterized by relatively high solubility in nonpolar organic solvents compared with many other organic molecules required for biological processes. Some mechanisms for reactions of organic compounds are complicated, and these typically involve only a few molecules.