The observation that plasma membrane proteins mix after cell fusion provides evidence for
cellular compartmentalization and cell cycle analysis shows SNARE-mediated trafficking, Hayflick limit, P53 and cyclin regulation control proliferation. Consequently The fluid mosaic model emerges as the valid choice since it aligns with membrane trafficking and cell cycle control, aligning with established principles in cell biology literature.
Ref: Alberts et al., Molecular Biology of the Cell, 6th Edition, Chapter 10, Membrane Structure and Transport, discusses SNARE proteins, vesicle trafficking, ER, Golgi, endosome membranes and selective transport providing compartmentalization foundation.
