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Cell Wall Video Lecture | Crash Course: Class 9 (Hinglish)
FAQs on Cell Wall Video Lecture - Crash Course: Class 9 (Hinglish)
| 1. What is the cell wall? |  |
The cell wall is a rigid layer that surrounds the cell membrane of plant cells, bacteria, fungi, and some protists. It provides structural support and protection to the cell, helping it maintain its shape.
| 2. What is the composition of the cell wall? | |
The composition of the cell wall varies depending on the organism. In plant cells, the primary component of the cell wall is cellulose, a complex carbohydrate. Other components include hemicelluloses, pectins, and lignin. In bacterial cell walls, peptidoglycan is a key component, while fungal cell walls contain chitin.
| 3. What is the function of the cell wall? | |
The cell wall has several important functions. It provides structural support, allowing plants to grow upright. It also acts as a barrier, protecting the cell from external stresses and pathogens. Additionally, the cell wall helps regulate water balance and allows for cell-cell communication.
| 4. How does the cell wall differ from the cell membrane? | |
The cell wall and the cell membrane are distinct structures with different functions. While the cell membrane controls the movement of substances in and out of the cell, the cell wall provides rigidity and support. The cell membrane is made up of lipids and proteins and is selectively permeable, whereas the cell wall is primarily composed of carbohydrates and is not selectively permeable.
| 5. Can animal cells have a cell wall? | |
No, animal cells do not have a cell wall. Instead, they have a flexible cell membrane that surrounds and protects the cell. Animal cells rely on internal structures, such as the cytoskeleton, for support and shape maintenance. The absence of a cell wall allows animal cells to be more versatile and dynamic in their movements and interactions.
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Nov 22, 2024 Last updated |
Video Description: Cell Wall for Class 9 2024 is part of Crash Course: Class 9 (Hinglish) preparation.
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