The cell cycle or cell-division cycle is the series of events that take place in a cell leading to its division and duplication of its DNA to produce two daughter cells.
A new cycle begins after a cell has divided and produced two new Cells. Each new cell metabolises grows and develops.
At the end of its cycle the cell divides to produce two Cells, which can then undergo additional cell cycles.
The cell cycle consist of two major phases -
1- Interphase
2- M phase
A new cycle begins after a cell has divided and produced two new Cells. Each new cell metabolises grows and develops.
At the end of its cycle the cell divides to produce two Cells, which can then undergo additional cell cycles.
The cell cycle consist of two major phases -
1- Interphase
2- M phase
1- Interphase -
Interphase is the extended period of growth and development between cell divisions.
In Interphase, DNA being synthesised, RNA and proteins are being produced, and hundreds of biochemical reactions necessary for cellular functions are taking place.
In addition to growth and development, Interphase includes several checkpoints, which regulate the cell cycle by allowing or prohibiting the cell's division.
These checkpoints ensure that all cellular components are present and in good working order before the cell proceeds to the next stage.
The Interphase further divided into three sub-phases -
G1 phase
S phase
G2 phase
The Interphase further divided into three sub-phases -
G1 phase
S phase
G2 phase
G1 phase -
In G1, the cell grows and proteins necessary for cell division are synthesised near the end of G1 phase, a critical point termed the G1/S checkpoint hold the cell in G1 until the cell has all of the enzymes necessary for the replication of the DNA.
After G1, the cell enters the S phase.
S phase -
In this phase each chromosome duplicates.
DNA synthesis must take place before the cell can proceed to mitosis.
After S-phase, the cell enters G2 phase.
G2 phase -
In this phase, several additional biochemical events necessary for cell division takes place.
The G2/M checkpoint is passed if the cell's DNA is undamaged.
After the G2/M checkpoint has been passed, the cell ready to divide and enters the M phase.
2- M phase -
The M phase is the part of the cell cycle in which the copies of the cell's chromosomes separate and cell undergos divisions
The cell division are of two types..
