Which of the following is found in the plasma membrane of a cell?

Which of the following is found in the plasma membrane of a cell?
A . phospholipid
B . glycoprotein
C . cholesterol
D . all of the above

View Answer

Answer: D

Explanation:

The plasma membrane of a cell is composed of a phospholipid bilayer, a double layer of lipids combined with phosphate groups. The hydrophilic nature of the phosphate heads and the hydrophobic nature of the lipids create a double-sided membrane with phosphates on both sides and lipids trapped between. Cholesterol and glycoprotein molecules are embedded inside the phospholipid bilayers.