According to the fluid-mosaic model of a cell membrane, the main component of a membrane is
A)a lipid bilayer.
B)a membrane protein.
C)a glycoprotein.
D)a steroid.
E)a prostaglandin.

Question

Quizplus · Accepted Answer

The fluid-mosaic model of a cell membrane states that the main component of a membrane is a lipid bilayer, which is made up of two layers of phospholipids arranged tail to tail. This bilayer acts as a barrier to most solutes, and also contains embedded proteins that regulate the transport of specific molecules in and out of the cell. Glycoproteins, steroids, and prostaglandins may also be present in the membrane, but they are not the main component.

According to the Fluid-Mosaic Model of a Cell Membrane, the Main