Multiple Choice
Which of the following statements about lipids is correct?
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1. Introduction to Biochemistry
Lipids
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Phospholipids and triglycerides both _____.
A
are major components of cell membranes
B
contain a phosphate group
C
have two fatty acid tails
D
contain glycerol as a backbone
Verified step by step guidance1
Understand the structure of phospholipids: Phospholipids consist of a glycerol backbone, two fatty acid tails, and a phosphate group attached to the third position of the glycerol. They are key components of cell membranes.
Understand the structure of triglycerides: Triglycerides consist of a glycerol backbone and three fatty acid tails attached to the glycerol through ester bonds. They are primarily used for energy storage.
Compare the two molecules: Both phospholipids and triglycerides share the common feature of having a glycerol backbone, which serves as the structural foundation for attaching fatty acids and other groups.
Eliminate incorrect options: Phospholipids are major components of cell membranes, but triglycerides are not. Phospholipids contain a phosphate group, while triglycerides do not. Phospholipids have two fatty acid tails, but triglycerides have three.
Conclude the correct answer: The shared characteristic between phospholipids and triglycerides is that they both contain glycerol as a backbone.
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