Which macromolecule forms a double layer as the primary structure of cell membranes? A) fats B) oils C) phospholipids D) steroids

The awnser should be C. Phospholipids

I think the correct answer from the choices listed above is option C. The macromolecule that forms a double layer as the primary structure of cell membranes is called phospholipids. It consist of a glycerol molecule, two fatty acids, and a phosphate group that is modified by an alcohol.