Final answer:
The current theory of the structure of the plasma membrane is the fluid mosaic model, which consists of a phospholipid bilayer with embedded proteins. This model allows for the flexibility and movement of molecules within the membrane.
Step-by-step explanation:
The current theory of the structure of the plasma membrane is best described by the fluid mosaic model. The fluid mosaic model proposes that the plasma membrane is composed of a phospholipid bilayer with embedded proteins. The phospholipids have a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail, forming a flexible boundary between the cell and its external environment.
The proteins within the membrane can have various functions, such as transporting molecules across the membrane, acting as receptors for cell signaling, and providing structural support. The fluidity of the membrane allows for the movement of these proteins and other molecules within the lipid bilayer, creating a dynamic and adaptable structure.
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