Question

which macromolecule forms a double layer as the primary structure of cell membranes?
fats
oils
phospholipids
steroids

Explanation:

Cell membranes are primarily composed of a phospholipid - bilayer. Phospholipids have a hydrophilic head and a hydrophobic tail, which allows them to form a double - layer structure that is essential for the function of the cell membrane. Fats, oils, and steroids do not form the primary double - layer structure of cell membranes.

Answer:

C. phospholipids