Cell Cycle
A centromere is

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

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Cell Cycle
Which of the following statements about mitosis is incorrect?

Chromosomes separate during anaphase when the kinetochore microtubules shorten as they depolymerize
Chromosomes separate during anaphase due to the interaction of polar microtubules from opposite poles pushing against each other
Chromosomes move to the metaphase plate using motor proteins, a kind of kinesin, attached to spindle fibers
The daughter nuclei are genetically identical to the parent nucleus

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Cell Cycle
The cell cycle is controlled in most cells by

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

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