In the Fluid Mosaic Model of Cell Membranes, What Does

Question

In the fluid mosaic model of cell membranes, what does the "fluid" part of the model refer to?
A) the constant movement of the hydrophilic tails in the interior of the membrane
B) the phospholipid and protein molecules, which move and exchange places within the two layers of phospholipids
C) the free movement of cholesterol molecules within the membrane
D) a thin layer of water found sandwiched between the two layers of phospholipids

Accepted Answer

The "fluid" part of the fluid mosaic model refers to the mobility of phospholipid and protein molecules within the membrane, allowing them to move laterally and occasionally flip-flop across the membrane layers.