Cell Cycle
A centromere is

the structure to which microtubules attach
another name for kinetochore
a constriction on a chromosome bound to a disk
All of these

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Cell Cycle
The cell cycle is controlled in most cells by

a series of checkpoints
time (after a certain length of time the cell divides)
cell size (when the cell reaches a certain size, it divides)
different cells exhibit different control strategies

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