Every cell is surrounded by a boundary. In Biology (Class 9 - The Fundamental Unit of Life), distinguishing between the Cell Membrane (Plasma Membrane) and the Cell Wall is a foundational concept.
Cell Membrane: Found in all cells; flexible; selectively permeable.
Cell Wall: Found only in plants/fungi/bacteria; rigid; made of cellulose.
Animal Cells: Do NOT have a cell wall.
Location: The cell wall is the outermost layer; the cell membrane is inside it.
| Feature | Cell Membrane | Cell Wall |
|---|---|---|
| Found in | All cells (Plant & Animal) | Plant, Fungal, Bacterial cells ONLY |
| Rigidity | Flexible and thin | Rigid and thick |
| Living Status | Living component | Non-living component |
| Permeability | Selectively permeable | Freely permeable |
| Made of | Lipids and Proteins | Cellulose (in plants) |
The main difference is that a cell wall is a rigid, non-living outer layer found only in plants, fungi, and bacteria. The cell membrane is a living, flexible inner layer found in all cells, including animal cells.
No. The cell wall is freely permeable, allowing most substances to pass. It is the cell membrane that is selectively permeable and controls entry and exit.
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