Evaluate the importance of choline in the structure of phosphatidylcholine and sphingomyelin for cellular communication.

• A. Choline's presence reduces the ability of these lipids to participate in signaling pathways.
• B. Choline's presence enhances the ability of these lipids to participate in signaling pathways.
• C. Choline's presence has no effect on the ability of these lipids to participate in signaling pathways.
• D. Choline's presence hinders the ability of these lipids to participate in signaling pathways.

Answer: (B)