The plasma membrane of E. coli is about 75% protein and 25% phospholipid by weight. How many molecules of membrane lipid are present for each molecule of membrane protein? Assume an average protein M, of 4.7 x 10“ and an average phospholipid M, of 800. Round to the nearest whole number. lipid molecules : protein molecules = What more would you need to know to estimate the fraction of the membrane surface that is covered by lipids? the average cross-sectional area of phospholipid and protein molecules in the bilayer the average volume of phospholipid and protein molecules in the bilayer O the shape of phospholipid and protein molecules in the bilayer estimation is not possible, even with additional information

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Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.