1. What is the cell division cycle?
The cell division cycle or the cycle is a series of events that takes place in a cell which causes the cell into two daughter cells. It consists of two primary phases
Interphase: It is an active phase between subsequent cell divisions. This consists of multiple phases. These are
G0: It is the resting phase between cell divisions
G1: The cell shows metabolic activity and grows continuously
S phase: DNA duplication takes place in this phase
G2: Protein synthesis takes place
Quiescent stage: The cell does not undergo further division and exits the G1 stage and enter the inactive stage.
M phase: Cell division takes place in this phase. It consists of 2 phases:
2. Why is cell division necessary?
Cell division serves as a means of cell reproduction in both unicellular and multicellular organisms. In unicellular organisms, reproduction takes place through binary fission which is a type of mitotic division. In multicellular organisms, cell division assists in the formation of gametes which combine to produce organisms. Cell division also plays a role in the growth and development of an organism and repairs injuries.