Question

which macromlecules are often made of three fatty acids bound to a glycerol molecule

Answer 1

i believe the answer is lipids.

Answer 2

Lipids

The molecules of such a lipid are made up of a glycerol molecule with three fatty acid molecules attached to it. This kind of lipid is also called a triglyceride. An important class of lipids is composed of the phospholipids that make up cell membranes.