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.
In sketching cell membrane structures, a phospholipid molecule is often represented by an icon like the above with the top part representing the polar phosphorous-containing part and the two extensions representing the fatty acids.hospholipids make up an important class of lipids for the construction of cell membranes. The phospholipids are not true fats because they have one of the fatty acids replaced by a phosphate group.