Bio 1000: Cell Cycle in Eukaryotes- Interphase

CELL CYCLE IN EUKARYOTES- INTERPHASE

1. The beginning of cell cycle is the interphase
• The cell grows and replicates its DNA in preparation for mitosis ( M phase) and cytokinesis
• Begins with a daughter cell from previous cycle entering an initial period of cytoplasmic growth
• The initial growth is called G1 (gap) phase of the cell cycle which makes various RNAs , proteins and other types of cellular molecules but not nuclear DNA
• If the cell is going to divide, DNA replication begins, initiating the S (synthesis) phase of the cell cycle
• Cell duplicates the chromosomal proteins as well as DNA
• After S phase, the cell enters the G2 phase (second gap)
• The cell continues to synthesize RNAs and proteins
• End of G2 phase, mitosis begins

G1 stage is also the site at which many cell types stop dividing and this state is referred to as the G0 phase.