What Kind of Molecule Forms a Bilayer That is the Basis

Question

What kind of molecule forms a bilayer that is the basis for all cellular membranes?
A) carbohydrate
B) cholesterol
C) phospholipid
D) protein

Accepted Answer

Phospholipids form a bilayer that is the basis for all cellular membranes. The hydrophilic (water-loving) head of the phospholipid faces outwards and interacts with the aqueous environment, while the hydrophobic (water-fearing) tail faces inwards, creating a barrier that separates the internal environment from the external one.