Cell cycle: easy and brief description

Cell cycle

Cyclic changes of a cell involving interphase and mitosis is known as the cell cycle.

There are two stages of cell cycle

1. Inter-phase : divided into three phases:

                            G1 Phase

                             S phase and

                              G2 phase

2. Mitosis

Interphase

The phase between two mitoses is called inter-phase

Phase	Duration	Synthesize
The G1 phase it began at the end of M phase	longest duration the most variable phase of the cell cycle	the RNA and protein synthesis
S phase	7 to 10 hrs	DNA synthesis
G2 phase	1hr	Accumulation of energy (for mitosis) Synthesis of tubulin (for formation of mitotic microtubules) Synthesize of chromosomal non-histone proteins

G0: Some terminally differentiated cells leave the cell cycle after the M phase and enter Go phase

Example : neuron