Question

Why do phospholipids form a bilayer in water?
A. The phosphate portions repel each other.
B. The hydrophilic and hydrophobic parts attract each other.
C. The phosphate portions attract water, and the lipid portions repel water.
D. The lipid portions attract water, and the phosphate portions repel water.

Answer 1

Answer:

c

Explanation of Answer:

When phospholipids are mixed with water, they spontaneously rearrange themselves to form the lowest free-energy configuration. This means that the hydrophobic regions find ways to remove themselves from water, while the hydrophilic regions interact with water. The resulting structure is called a lipid bilayer.

Answer 2

Answer:

C. The phosphate portions attract water, and the lipid portions repel water.

Explanation:

A phospholipid is a molecule whit a polar head and two nonpolar tails.

In water, they dispose of the heads (phosphates) to the water and the tails (lipids) to the center, away from the water.

All animal cells have this kind of bilayer disposition called lipid bilayer.