Theory 01/Cell division cycle/Onset phase
Commitment Is a Size Threshold
The claim
A cell commits to division only above a size threshold set by the ratio of biosynthetic capacity to the volume added per cycle.
01Mechanism
Commitment requires enough material to complete a cycle once started; the ratio determines when that is true.
02Prediction
Commitment size should track the capacity ratio.
03Refutation
Commitment independent of size would remove the threshold.