Topic Details (Notes format)

Cell: The Fundamental Unit of Life

Subject: General Science

Book: NCERT Science Class 9

The cell is the basic structural and functional unit of life.
- **Types of Cells**:
- Prokaryotic (bacteria) vs Eukaryotic (plants, animals).
- **Cell Organelles and Their Functions**:
- Nucleus: Controls cell activities.
- Mitochondria: Powerhouse of the cell.
- Ribosomes: Protein synthesis.
- Golgi Apparatus: Packaging and transport.
- **Cell Membrane and Cell Wall**:
- Cell membrane: Controls entry and exit of substances.
- Cell wall: Provides structure in plant cells.

**Possible Exam Questions:**
1. What are the differences between prokaryotic and eukaryotic cells?
2. Describe the structure and function of the nucleus.
3. How does the mitochondria generate energy?
4. What are the functions of the Golgi apparatus?
5. Explain the role of the cell membrane in maintaining homeostasis.