Lipid Components of Biological Membranes

Understanding the structure and function of biological membranes is crucial in biochemistry. Membranes are primarily composed of lipids, with phospholipids playing a significant role in membrane structure. Phospholipids consist of a hydrophilic (water-attracting) 'head' and two hydrophobic (water-repelling) 'tails'. This unique arrangement enables the formation of a bilayer structure that is fundamental to cell membrane integrity.

Which of the following lipid types forms the major structural component of biological membranes?