Biology

The correct answer is: B.Cell membrane.

1.Hydrophobic and hydrophilic interactions are crucial in the formation of the cell membrane, which is primarily composed of a phospholipid bilayer. In this bilayer:

2.The hydrophilic (water-attracting) heads of the phospholipids face outward toward the aqueous environment, interacting with water.

3.The hydrophobic (water-repelling) tails face inward, away from water, creating a hydrophobic core that acts as a barrier to most water-soluble substances.

This arrangement is fundamental to the cell membrane's role in protecting the cell, controlling what enters and exits, and maintaining t...