It is therefore a universal solvent and has a high boiling point, a high capacity to absorb heat, and lower density as a solid than as a liquid. Water is a good evaporative coolant, and water also shows adhesion and cohesion. Organic molecules contain the element carbon , inorganic molecules do not. Disaccharides and polysaccharides are made of linked simple sugars. Lipids are nonpolar, are made of carbon, hydrogen, and oxygen, but with much less oxygen.
Fats contain a glycerol and fatty acids off of that.
If they have all single bonds in the fatty acids, they are saturated . If they have one or more double bonds, they are unsaturated . The double bonds act as kinks and therefore the unsaturated fat molecules cannot be as close to one another. One can consider the protein to have several layers of structure. The primary structure is the linear sequence of amino acids.