A) lipids and proteins
B) lipids, proteins and carbohydrates
C) lipids only
D) proteins only
Correct Answer: B
Solution :
Chemically the plasma membrane or cell membrane is made up of approximately 60% protein and 40% lipids by dry weight, however the percentage may very from 20-70%. The percentage of carbohydrates ranges from 1-10 which are in the form of glycoproteins or glycolipids.
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