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

• A. The glycerol backbone has no impact on membrane fluidity.
• B. The glycerol backbone provides a flexible framework for membrane fluidity.
• C. The glycerol backbone hinders membrane fluidity.
• D. The glycerol backbone provides a rigid framework for membrane fluidity.

Answer: (B)