Question

The ___ is composed of a phospholipid bilayer.

• A. cell wall
• B. plasma membrane
• C. cytoplasm
• D. all of the above

Answer 1

The correct option is B plasma membrane

The plasma membrane is the boundary between the cell and its environment. It regulates what enters and exits the cell.
Cells must maintain an appropriate amount of molecules to function inside them.
The plasma membrane is composed of a phospholipid bilayer, which is two layers of phospholipids back-to-back. Phospholipids are lipids with a phosphate group attached to them.