Social Identity Theory and Group Selection. We can see now that, based on the social identity theory and the aspects we have talked about here, this theory and its fundamental aspects helps us to understand why people join groups.
Phospholipids are a class of lipids that are a major component of all cell membranes. They can form lipid bilayers because of their amphiphilic characteristic. The structure of the phospholipid molecule generally consists of two hydrophobic fatty acid tails and a hydrophilic head consisting of a phosphate group.The two components are joined together by a glycerol molecule.The phosphate groups can be modified with simple organic molecules such as choline.hey can form lipid bilayers because of their amphiphilic characteristic. The structure of the phospholipid molecule generally consists of two hydrophobic fatty acid tails and a hydrophilic head consisting of a phosphate group. The two components are joined together by a glycerol molecule.
Most phospholipids contain a âdiglycerideâ, a phosphate group and a simple organic molecule such as choline, which is a water-soluble essential nutrient. In water based solution, the phospholipids automatically arrange themselves into a double layer, or as a âphospholipid bi layerâ.The fatty acids, which repel water, are found in the middle of the bi layer.n water based solution, the phospholipids automatically arrange themselves into a double layer, or as a âphospholipid bi layerâ. The fatty acids, which repel water, are found in the middle of the bi layer.