Class 12th Bio- Chapter-Cell Cycle

Full Chapter Notes

Short Question

MCQ’s

Class 12th Biology Chapter – “Cell Cycle” covers the series of events that lead to cell division. Key points include:

1. Phases of the Cell Cycle:
   • Interphase: Comprising G1 (cell growth), S (DNA replication), and G2 (preparation for mitosis).
   • M Phase (Mitosis): The actual division of the cell, including prophase, metaphase, anaphase, and telophase.
2. Cytokinesis: The process that follows mitosis, dividing the cytoplasm to form two daughter cells.
3. Regulation: The cell cycle is regulated by cyclins and cyclin-dependent kinases (CDKs), with checkpoints ensuring proper progression.
4. Importance: The cell cycle is crucial for growth, development, and tissue repair, and its disruption can lead to cancer.

This chapter provides a foundational understanding of how cells grow and divide, which is essential for studying biology and health sciences.