In the context of the lipid bilayer, how are phospholipids arranged in the cell membrane?

• A. They form a bilayer with hydrophobic tails facing outward toward the aqueous environments and hydrophilic heads facing inward away from water.
• B. They form micelles in which hydrophilic heads cluster at the center and hydrophobic tails face outward toward water.
• C. They form a bilayer with hydrophilic phosphate heads facing the aqueous cytosol and extracellular fluid and hydrophobic fatty acid tails facing inward toward each other.
• D. They form a single layer with hydrophobic tails facing the cytosol and hydrophilic heads facing the extracellular fluid.

Answer: (C)