The cell membrane is composed mainly of
A)cytosol.
B)phospholipids and proteins.
C)phospholipids and nucleic acids.
D)water.
E)proteins and glycocalyx.

Question

The cell membrane is composed mainly of
A)cytosol.
B)phospholipids and proteins.
C)phospholipids and nucleic acids. 
D)water.
E)proteins and glycocalyx.

Quizplus · Accepted Answer

The cell membrane is primarily composed of phospholipids and proteins. The phospholipid molecules are arranged in a bilayer, with the hydrophobic tails facing each other and the hydrophilic heads facing the extracellular and intracellular environments. Proteins are embedded within or associated with the membrane, serving important functions such as transport, signaling, and structure. While there are small amounts of other components, such as cholesterol and carbohydrates (forming the glycocalyx), phospholipids and proteins are the main constituents.

The Cell Membrane Is Composed Mainly of