Question

Why is a cell membrane called a phospholipid bilayer?

Answer 1

A cell membrane is a bilayer because it is made up of 2 layers of lipids. The heads of the lipids are faced towards the opposites sides (the inside and outside of a cell) while the tail (the 2 fatty acids) are inside the layer facing each other.

Answer 2

A cell membrane is a bilayer because it is made up of 2 layers of lipids. The heads of the lipids are faced towards the opposite sides (the inside and outside of a cell) while the tail (the 2 fatty acids) are inside the layer facing each other.