E. coli cell membranes are predominantly comprised of which of the following?

E. coli cell membranes are predominantly comprised of phospholipids, which play a critical role in forming the structure of the membrane. The cell membrane, or plasma membrane, is primarily a lipid bilayer composed of phospholipids, which have hydrophilic (water-attracting) heads and hydrophobic (water-repelling) tails. This arrangement allows for the formation of a semi-permeable membrane that serves as a barrier, protecting the internal environment of the cell while regulating the passage of substances in and out.

In addition to phospholipids, the cell membrane contains proteins that serve various functions, such as transport, signaling, and structural support. While proteins are important components of the membrane, they do not constitute the predominant structural component when compared to phospholipids. Carbohydrates are present on the cell surface, often attached to proteins and lipids, and are involved in recognition and signaling processes, but they are not the main constituents of the membrane itself. Nucleic acids, such as DNA and RNA, are essential for genetic material and protein synthesis but do not play a role in the membrane structure.

The predominant role of phospholipids in E. coli cell membranes underscores their importance in maintaining the integrity