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Multiple Choice
What are the components of a phospholipid molecule?
A
Sphingosine, one fatty acid, and a phosphate group
B
Glycerol, two fatty acids, and a phosphate group
C
Glycerol, three fatty acids, and a phosphate group
D
Glycerol, two fatty acids, and a sulfate group
Verified step by step guidance
1
Understand the structure of a phospholipid molecule: Phospholipids are a class of lipids that are a major component of all cell membranes. They can form lipid bilayers because of their amphiphilic characteristic.
Identify the backbone of a phospholipid: The backbone of a phospholipid is typically glycerol. Glycerol is a three-carbon molecule that serves as the foundation to which other components are attached.
Determine the number of fatty acids: In a phospholipid, two fatty acids are attached to the glycerol backbone. These fatty acids are hydrophobic and help form the interior of the lipid bilayer.
Recognize the polar head group: A phosphate group is attached to the third carbon of the glycerol backbone. This phosphate group is hydrophilic and interacts with the aqueous environment inside and outside the cell.
Differentiate from other lipid structures: Compare phospholipids with other lipid structures such as triglycerides, which have three fatty acids attached to glycerol, and sphingolipids, which have a sphingosine backbone instead of glycerol.