Final answer:
Davson and Danielli provided the protein-lipid-protein sandwich model of the general cell membrane structure, but the fluid mosaic model proposed by Singer and Nicolson is the most widely accepted.
Step-by-step explanation:
Davson and Danielli provided the model of the general cell membrane structure known as the protein-lipid-protein sandwich.
According to this model, proteins are bound to the polar heads of phospholipids in the plasma membrane, creating a sandwich-like structure.
However, the fluid mosaic model proposed by Singer and Nicolson in 1972 is now widely accepted as the most accurate representation of the cell membrane structure.