I'm a biology dilettante who is trying to get a correct picture of the cell. From this web page http://www.arcfn.com/2011/07/cells-are-very-fast-and-crowded-places.html one gets a very chaotic impression. Small molecules are racing around with 250 miles per hour. Ken Shirrif: "In addition, a typical protein is tumbling around, a million times per second. Imagine proteins crammed together, each rotating at 60 million RPM, with molecules slamming into them billions of times a second. This is what's going on inside a cell." I was wondering if this is a commonly held view here or that someone is willing to dispute this.