Multiple Choice
Which of the following is not one of the four main components of all plasma membranes?
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2. Cell Chemistry & Cell Components
Biological Membranes
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The tails of the phospholipids of the plasma membrane are composed of _____ and are _______?
A
fatty acids and are hydrophobic
B
nucleic acids and are hydrophobic
C
carbohydrates and are hydrophilic
D
amino acids and are hydrophilic
Verified step by step guidance1
Understand the structure of a phospholipid: A phospholipid is composed of a glycerol backbone, two fatty acid tails, and a phosphate group head.
Identify the nature of the phospholipid tails: The tails are made of long chains of fatty acids.
Determine the chemical properties of fatty acids: Fatty acids are nonpolar molecules, which means they do not mix well with water.
Define hydrophobic: Hydrophobic substances are those that repel water or do not mix with water, often due to being nonpolar.
Conclude the characteristics of the phospholipid tails: Since the tails are composed of fatty acids and are nonpolar, they are hydrophobic.
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