Cell Cycle and Cell Division
CBSE · Class 11 · Biology
Summary of Cell Cycle and Cell Division for CBSE Class 11 Biology. Key concepts, important points, and chapter overview.
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Overview
Cell cycle is the sequence of events by which a cell duplicates its genome, synthesises the other constituents of the cell, and finally divides into two daughter cells. Cell division is essential for growth, repair, reproduction, and continuity of life. Interphase prepares the cell for division, whi
Key Concepts
The cell cycle is the ordered
The cell cycle is the ordered sequence in which a cell grows, replicates its DNA, and divides into two daughter cells. Human cells in culture divide o
Interphase is the phase between two
Interphase is the phase between two successive M phases. It lasts more than 95% of the cell cycle and includes G1, S, and G2 phases. The cell grows, r
G1 phase is the interval between
G1 phase is the interval between mitosis and the start of DNA replication. The cell grows continuously and performs normal metabolism, but DNA is not
S phase is the synthesis phase
S phase is the synthesis phase during which DNA replication occurs. DNA content doubles from 2C to 4C without any change in chromosome number. In anim
G2 phase is the stage
G2 phase is the stage in which proteins are synthesised for mitosis while cell growth continues.
Learning Objectives
- Understand the meaning of cell cycle and its main phases
- Describe interphase as G1, S, and G2 phases
- Explain the stages of mitosis and cytokinesis in animal and plant cells
- Distinguish mitosis from meiosis
- Describe the stages of meiosis I and meiosis II
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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