Cell Division — Chapter Summary
ICSE · Class 10 · Biology
Summary of Cell Division for ICSE Class 10 Biology. Key concepts: The cell cycle is the period, Interphase is the growth and In G1 phase.
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Cell division is essential for growth, repair, reproduction, and the continuity of life. As a cell grows, the normal ratio between the volume of cytoplasm and the size of the nucleus is disturbed, and the exchange of materials with the environment becomes less efficient. Division restores balance. C
Key Concepts
The cell cycle is the period
The cell cycle is the period from the end of one division of a cell to the end of the next division. It is mainly divided into interphase and the divi
Interphase is the growth period between
Interphase is the growth period between two successive divisions. It has three stages: G1, S, and G2.
In G1 phase
In G1 phase, RNA and protein are synthesized, and chromosomes are uncoiled and thin. It forms 30-40% of the cell cycle.
In S phase
In S phase, DNA is replicated and histone proteins are synthesized. Each chromosome becomes made of two chromatids. It forms about 30-50% of the cell
In G2 phase
In G2 phase, RNA and protein are synthesized, organelles are duplicated, and spindle proteins are made. It forms 10-20% of the cell cycle.
Learning Objectives
- Understand why cells divide in living organisms
- Describe the main phases of the cell cycle
- Explain interphase and its three stages
- Distinguish between mitosis, meiosis, and amitosis
- Describe the stages of mitosis in correct order
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