A lipid is an undecomposed substance of plant or animal origin that is soluble in nonpolar solvents such as ether. Nonhydrolyzable lipids include steroids , terpenes , and others . It is a wax. They are both esters of glycerol and long-chain fatty acids. The oils are more likely to have double bonds in the fatty acid part of the molecule.
Oils are more likely to come from plants and fats from animals.
Explain why, drawing structures to illustrate your discussion. The one with a cis-double bond is going to have a kink in it. See slide 161 on p. 27 of the PowerPoint notes. An omega-3 fatty acid is a fatty acid with a double bond between the third and fourth carbons from the omega end . Draw the structure of a triglyceride that contains one palmitic acid, one oleic acid, and one stearic acid portion.