Final answer:
The statement is false; phosphatidylcholine and phosphatidylethanolamine are more abundant in cell membranes than Phosphatidylserine. Phospholipids have hydrophobic fatty acid chains and form a bilayer, creating barriers to polar molecules.
Step-by-step explanation:
The statement that Phosphatidylserine is the most abundant type of phospholipid found in cell membranes is False. Phospholipids are indeed crucial components of the cell membrane, but the most abundant phospholipids are phosphatidylcholine and phosphatidylethanolamine. The part of a phospholipid molecule in the plasma membrane made of fatty acid chains is hydrophobic, meaning it repels water and is oriented toward the interior of the membrane, creating a bilayer that serves as a barrier to most polar or charged molecules.
The two layers of phospholipids in the plasma membrane are commonly referred to as a phospholipid bilayer. Additionally, the side of the cell membrane that faces the cytoplasm is typically hydrophilic, meaning it is attracted to water. Cholesterol is another important lipid found in cell membranes that helps to modulate fluidity and is more abundant in cells that require more rigid membranes.