Question: how many oxygen molecules are present in the hydrocarbon chain of a fatty acid?
Answer: In a fat molecule, a fatty acid is attached to each of the three oxygen atoms in the –OH groups of the glycerol molecule with a covalent bond (Figure 2). Figure 2. Lipids include fats, such as triglycerides, which are made up of fatty acids and glycerol, phospholipids, and steroids.