Which of the following components is NOT part of the glycerophospholipid structure?

Analyze the structural differences between sphingolipids and glycerophospholipids and explain how these differences affect their function in membranes.

Evaluate the impact of having one fatty acid versus two fatty acids in membrane lipids on their biological function.

Synthesize the information on sphingomyelin's structure to explain its role in nerve cell membranes.

Analyze the role of the glycerol backbone in glycerophospholipids and its impact on membrane structure.

Evaluate the consequences of prokaryotes' inability to synthesize phosphatidylcholine for their evolutionary adaptation.

Which of the following is a characteristic of sphingolipids?