the diagram shows the general structure of a lipid, which consists of two main parts. which part is circled…

Brief Explanations:

Lipids are composed of a glycerol molecule and fatty - acid chains. The circled part is a glycerol molecule which contains an alcohol group. A fatty acid has a long hydrocarbon chain with a carboxyl group at one end. The circled part does not represent a fatty acid, carboxyl group, or unsaturated lipid.

Answer:

alcohol group