Question

why do lipids technically not have true monomer?

Explanation:

Lipids are not polymers in the traditional sense because they are formed by the ester - linkage of a glycerol molecule with fatty acids. Unlike polymers such as proteins (made of amino - acid monomers) or nucleic acids (made of nucleotide monomers), there is no single repeating unit that can be considered a true monomer for lipids. Fatty acids vary in length and degree of unsaturation, and the combination of glycerol with different fatty acids does not follow a simple monomer - polymer relationship.

Answer:

Lipids are formed by the ester - linkage of glycerol and fatty acids, and there is no single repeating unit that can be considered a true monomer as in other polymers.