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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:
Structure of plasma membrane: Bacterial membrane are composed of phosholipid and proteins. The arrangement of proteins and lipids to form a membrane is called the fluid mosaic model. Dispersed within the phoshopholipid bi-layer are various structural and enzymatic protiens which carry out most membrane functions.