What type of molecules are phospholipids classified as?

Phospholipids are classified as amphipathic molecules due to their unique structure that features both hydrophilic (water-attracting) and hydrophobic (water-repelling) components. Each phospholipid molecule consists of a hydrophilic "head," which contains a phosphate group, and two hydrophobic "tails" made up of fatty acids. This dual nature allows phospholipids to arrange themselves into bilayers, which are fundamental for the formation of cell membranes. The hydrophilic heads face outward towards the aqueous environment, while the hydrophobic tails face inward, away from water.

This amphipathic characteristic is crucial for the formation of cellular structures and the functionality of membranes, as it provides a barrier that separates the interior of the cell from the external environment while allowing selective permeability for various substances.

Understanding the nature of phospholipids as amphipathic molecules is essential in the study of cell biology and biochemistry, as they play a critical role in membrane dynamics and cellular processes.