Final answer:
The four main components of eukaryotic membranes are the lipid bilayer, transmembrane proteins, cell surface markers, and the extracellular matrix. These elements are essential for maintaining cell integrity, enabling transport, and facilitating communication and recognition among cells.
Step-by-step explanation:
The four main components of all eukaryotic membranes are A) Lipid bilayer, D) Transmembrane proteins, E) Cell surface markers, and F) Extracellular matrix. The lipid bilayer forms the basic structure of the plasma membrane, providing a flexible yet sturdy barrier. Transmembrane proteins are embedded within this bilayer and facilitate transport and various other functions.
Cell surface markers, which often comprise carbohydrates attached to lipids (glycolipids) or proteins (glycoproteins), play a critical role in cell-to-cell recognition and communication. Finally, the extracellular matrix is a network of material that supports the plasma membrane and contributes to structural stability, cell adhesion, and communication.
Actin filaments and the interior protein network, while important to cell structure and function, are not considered main components of the plasma membrane itself.