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Cell cycle
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Cell cycle
includes all the events between two consecutive cell divisions or between cell division and cell death
comprises
mitosis
(cell division) and
interphase
a cell enters the
interphase
immediately upon completing division. First, it passes through a postmitotic period (
phase
G
1
, an increase of cell mass to gain that of the mother cell). After that the cell begins to prepare for the next division or enters a resting state (
phase
G
0
#1,
#2
) to exert its specific functions
when
G
0
is finished, the cell can begin to prepare for a new cell
division
or
to die
cells that prepare to divide first pass through the
synthetic
(
phase
S
, DNA replication) and then
premitotic
(
phase
G
2
, preparation for mitosis) period
cell death
is the final step of cell cycle for a number of differentiated cells. It is realized via such mechanisms as
apoptosis
(programmed cell death) and
necrosis
(accidental cell death). It can be a result of terminal cell differentiation