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Let's review. Phospholipids are a type of lipid-one of the four main classes of molecules that make up living things. Phospholipids serve a very important function by surrounding and protecting internal cell components.
Phospholipids 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.This sketch of a phospholipid molecule shows two fatty acids and a phosphate group attached to a glycerol backbone.Stearic acid is shown as the fatty acid, but there are many variations in 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.