Describe the 4 phases of the cell cycle in eukaryotes:G1, S, G2, and M
-Three of these phases involve cell growth and one involves cell division.
The three growth stages are called INTERPHASE.
- The growth before DNA replication
- New proteins, ribosomes, mitochondria, and other cell compenents are formed in preparation of DNA synthesis and cell division.
- The length of this cycle determines the length of the entire cell cycle.
- 2.S Phase
- Period of DNA replication
- When S phases ends each chromosome is made up of 2 identical DNA molecules.
- 3.G2 Phase:
- Growth period after DNA replication .
- The cell continues to synthesize proteins.
- It is possible that some of these proteins promote cell division.. When all the necessary proteins have been synthesized cell division begins.
- 4. M Phase: Consists of 2 main events-mitosis and cytokinesis