198 Laboratory Manual for General, Organic, and Biological Chemistry 6. Predict what is present in each of the following: a. A solution that turns orange-red when mixed with Benedict's reagent and heated for 5 min. b. A solution that turns blue-black when mixed with a few drops of iodine reagent. c. A solution that forms a white precipitate when mixed with a few drops of ARNO,.

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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.