Ssc Biology Chapter 2 Hand Note Exclusive //free\\ May 2026

SSC Biology Chapter 2: Cells & Tissues – Exclusive Hand Note Guide

1. Key Definitions (Memory Box)

| Term | Definition | | :--- | :--- | | Cell | The structural & functional unit of life. | | Unicellular | Single-celled organism (e.g., Amoeba, Bacteria). | | Multicellular | Body made of many cells (e.g., Human, Mango tree). | | Tissue | Group of similar cells performing a specific function. | | Organ | Several tissues working together (e.g., Heart, Leaf). | | Cell Wall | Non-living, rigid outer layer of plant cells (made of Cellulose). | | Protoplasm | Living content of a cell = Cytoplasm + Nucleus. |

Nucleus (The Brain): Contains DNA/Chromatin. It controls all cellular activities. 3. Plastids: The Color Producers Plastids are unique to plant cells and come in three types: ssc biology chapter 2 hand note exclusive

Function: It is the site of Oxidative Phosphorylation and produces ATP (Adenosine Triphosphate). SSC Biology Chapter 2: Cells & Tissues –

  • Lysosomes:
  • Mitochondria:
    1. Prokaryotic cells: Cells lacking a true nucleus, e.g., bacteria.
    2. Eukaryotic cells: Cells with a true nucleus, e.g., plants, animals, fungi.