5.1·Fatty Acids Fatty acids are either saturated (all carbon- carbon bonds are single bonds)or unsaturated (with one or more double bonds in the hydrocarbon chain).If a fatty acid has a single double bond,it is said to be saturated, and if it has more than one,ated.5.1 · Fatty Acids Fatty acids are either saturated (all carbon￾carbon bonds are single bonds) or unsaturated (with one or more double bonds in the hydrocarbon chain). If a fatty acid has a single double bond, it is said to be monounsaturated, and if it has more than one, polyunsaturated