Principle 1: Molecules move through random collisions
Molecules move around through collisions resulting in random Brownian motion. In this example, in Treatment A, an Arp2/3 complex moves smoothly and linearly before binding to an actin filament, whereas in Treatment B, the motion is complex and chaotic.
To use this concept, consider depicting random walks.
Treatment A does not adhere to this principle, whereas Treatment B does.