Why are lipids not polymers?

Polymers are chains of smaller molecules that can interlink, while lipids have a starter molecule, like a fatty acid, and build long chains through a chemical reaction, like dehydration. read more

So, lipids only grow in one direction. Also, there is no natural fixed size to a polymer, so a process terminates it in living organisms. Some lipids have a natural limit, as additional hydrocarbons might not naturally dehydrate at the open end. read more

Proteins are considered polymers because they are made up of monomers, and lipids are not considered polymers because they are not made up of monomers. In order for the basic unit that makes up the lipid or protein to be called a monomer, the unit must occur in repetitive chains, which lipids do not. read more