According to the Fluid Mosaic Model of Membrane Structure,proteins of the Membrane

Question

According to the fluid mosaic model of membrane structure,proteins of the membrane are mostly
A)spread in a continuous layer over the inner and outer surfaces of the membrane.
B)confined to the hydrophobic interior of the membrane.
C)embedded in a lipid bilayer.
D)randomly oriented in the membrane, with no fixed inside-outside polarity.
E)free to depart from the fluid membrane and dissolve in the surrounding solution.

Accepted Answer

According to the fluid mosaic model of membrane structure, proteins are embedded in a lipid bilayer, which consists of two layers of phospholipid molecules. This bilayer forms the basic structure of the membrane, and the proteins are distributed throughout it, but they are not spread in a continuous layer over the inner and outer surfaces of the membrane. The proteins are also not confined to the hydrophobic interior of the membrane, as some are transmembrane proteins that span the entire membrane, while others are peripheral proteins that are attached to the surface of the membrane. The proteins in the membrane do have a fixed inside-outside polarity, with different amino acid sequences on each side of the membrane, which helps them to perform their functions in the appropriate location. Finally, the proteins are not free to depart from the fluid membrane and dissolve in the surrounding solution, as they are held in place by hydrophobic interactions with the lipid bilayer and by specific interactions with other proteins and molecules in the membrane.