NCERT Solutions for Class 11 Biology Chapter 10 Cell Cycle and Cell Division
NCERT Solutions for Class 11 Biology Chapter 10 Cell Cycle and Cell Division covers the phases of the cell cycle, and the processes of mitosis and meiosis, including their significance.
Overview of Topics & Subtopics (Click to Jump)
1. The Cell Cycle
Short Note:
• The cell cycle consists of Interphase (G1, S, G2 phases — growth and DNA replication) and M Phase (Mitosis) — actual cell division.
• S Phase (Synthesis): DNA replication occurs, and chromosome number remains the same, but DNA content doubles.
2. Mitosis
Short Note:
• Mitosis is equational division, producing two daughter cells genetically identical to the parent cell (2n → 2n).
• Phases: Prophase (chromatin condenses into chromosomes), Metaphase (chromosomes align at the equatorial plate), Anaphase (sister chromatids separate and move to opposite poles), Telophase (chromosomes decondense, nuclear envelope reforms), followed by cytokinesis.
3. Meiosis
Short Note:
• Meiosis is reductional division occurring in germ cells, producing four haploid daughter cells from one diploid parent cell (2n → n), essential for sexual reproduction.
• Consists of two sequential divisions: Meiosis I (reductional, includes crossing over/recombination during prophase I) and Meiosis II (equational, similar to mitosis).
NCERT Textbook Exercise Questions
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