For the following dienes, identify whether the molecules has any cis or trans stereochemistry and idenfity the conformation as either s-cis or s-trans, where appropriate. Please also note whether the compound would be reactive in a Diels-Alder reaction. H3C H3C, -CH3 CH3 CH3 Br H3C Br

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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.