Subject: Biology - 9TH
Chapter: Cell Cycle
Type: Free PDF Notes
What is mean by Cell Cycle ? — Free written notes for Biology - 9TH on EduFlame Pakistan.
The cell cycle is the process through which a cell grows, prepares, and then divides to form new cells. You can think of it like a continuous life journey of a cell, where it is born, grows up, makes preparations, and then splits into two new cells so the body can grow and repair itself.
Interphase:
It starts with a stage called interphase, which is the longest part of the cycle. During this time, the cell is not dividing but is very active. It grows in size, carries out normal functions, and also makes copies of its DNA. This step is very important because the new cells must receive complete and identical genetic information.
Division Phase (Mitosis):
After interphase, the cell enters the division phase, called mitosis in most body cells. In this stage, the copied DNA is carefully separated into two equal parts, and the cell’s contents are also divided.
Formation of New Cells:
At the end of this process, one parent cell becomes two identical daughter cells.
Importance of Cell Cycle:
This cycle is very important for living organisms because it helps in growth, healing of wounds, and replacement of old or damaged cells. For example, when you get a cut on your skin, new cells are produced through the cell cycle to repair the damaged area.
So, the cell cycle keeps life continuing smoothly by ensuring cells are always being renewed when needed.