Q: Phospholipids are unable to mix with what?


Read this paragraph and choose the correct option from the provided answers:

Molecules in the cell membrane allow it to be semipermeable. The membrane is made of a double layer of phospholipids (a "bilayer") and proteins ( Figure below ). Recall that phospholipids, being lipids, do not mix with water. It is this quality that allows them to form the outside barrier of the cell.

 Choices:

- nitrogen

- solids

- air

- water


A:
water