Which of the following is NOT TRUE concerning the functions of the parts of the plasma membrane? A. Phospholipids make up the majority of the lipid bilayer.

B. Proteins in the membrane are used for transporting substances across the membrane, can speed up chemical reactions on the membrane, and can receive chemical signals.

C. Cholesterol helps the membrane solidify at low temperatures.

D. Carbohydrates attach to proteins and lipids on the outside of the membrane to give the cell its identity.