Answer:
The sandwich is the close representation of the fluid mosaic model which explains the structure of the plasma membrane.
Although the sandwich model is not completely correct, in the given options, the most closely related model is the sandwich model. The metal spring, swiss roll, and electric wire don't share many similarities to the fluid mosaic model.
Explanation:
According to the fluid mosaic model, the lipid bilayer membrane has embedded proteins that allow the transportation of molecules inside/outside the cell. The model was proposed by SJ Singer & G. L. Nicolson in 1972. Previously, it was believed that the structure of the cell membrane is closely related to a sandwich in which two protein layers embed the lipid bilayers. This model was proposed by Davson and Danielle.
