What is the cell membrane made of? Choose 1

(Choice A)
A
Lipids and proteins only

(Choice B)
B
Lipids only

(Choice C)
C
Carbohydrates and lipids only

(Choice D)
D
Lipids, proteins, and carbohydrates

With few exceptions, cellular membranes — including plasma membranes and internal membranes — are made of glycerophospholipids, molecules composed of glycerol, a phosphate group, and two fatty acid chains. Glycerol is a three-carbon molecule that functions as the backbone of these membrane lipids.

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