What bis cell wall and cell membrane
Answers
Answer:
Class 9 Biology Fundamental Unit of Life. Cell wall. Cell wall. Cell Wall is found in plant cells outside the plasma membrane. It is a rigid covering made up of cellulose which a complex substance is providing structural support to the plants.
Explanation:
Difference between Cell Wall and Cell Membrane
The cell wall is present only in plants and the cell membrane is present in every living organism including plants. Present only in plants, and in some fungi, bacteria, algae. ... It protects and maintains the internal environment of the cell.
Cell Wall and Cell Membrane
A cell is the structural and functional working unit of life and also been described as building blocks and fundamental unit of an organism. The term cell was coined by an English scientist Robert Hooke in the year 1665. The shape and size of the cells vary according to their functions and compositions. There are different types of cells and can be differentiated based on the presence and absence of few cell organelles.
Table of Contents
Cell Wall
Cell Membrane
Difference between Cell Wall and Cell Membrane
Conclusion
Important Questions for Cell Wall and Cell Membrane
Cell Wall
Cell Wall
The cell wall is present only in plants, fungi, and bacteria. The image above represents a plant cell wall
The cell wall is the outermost covering of plant cells. It is present outside the cell membrane and is tough, flexible and sometimes rigid in its texture. It is mainly composed of cellulose, long fibres of carbohydrates including hemicellulose, lignin, and pectin.
The main functions of the cell wall are:
Protecting the cell against physical damage and invading pathogens.
Regulate and controls the direction of cell growth.
Providing the strength, structural support and maintaining the shape of the cell.
Functions as a storage unit by storing carbohydrates for use in plant growth, especially in seeds.
Cell Membrane
Cell Membrane is present in all organisms including plants
The cell membrane is also known as the plasma membrane. It is the outermost covering of animal cells. It is a semi-permeable membrane composed of lipids and proteins. The main functions of the cell membrane include:
shape as needed.
ned as the layer of polysaccharides that exists outside the plasma membrane. It is rigid and serves structural and supportive functions. On the other hand, the cell wall in fungi is made from another material called chitin, which is also found in the exoskeletons of arthropods.
The cell membrane is present in all living organisms, including plants. It is the outermost layer of the cell in animals and encloses other cellular organelles within. Unlike the cell wall, the cell membrane is flexible and its shape can be changed as needed. Also, it is metabolically active and has selective permeability.
Important Questions for Cell Wall and Cell Membrane
1. What is the main function of the cell wall?
The cell wall is the outermost layer in a plant cell. It provides structural support and rigidity for the plant body.
2. What is the function of the cell membrane?
Unlike the cell wall, the cell membrane is present in all living organisms, including plants. The main role of the cell membrane is to provide protection to the cell from its surroundings.
3. Are cell walls and cell membranes the same thing?
Cell walls are distinctly different from cell membranes. For instance, the cell wall is present only in plants, fungi and some bacteria. The cell membrane, on the other hand, is present in all living organisms including plants.
4. What is the role of the plasma membrane?
The cell membrane is also called the plasma membrane. It provides protection for the cell and its cellular components from the external environment. It is selectively permeable and regulates the movement of molecules in and out of the cell.
5. What is the primary component of the cell wall?
The primary component of the cell wall varies with different organisms. In the plant cells, cellulose is the primary component of the cell wall, in bacteria the primary component of the cell wall is peptidoglycan and in fungi the primary component of the cell wall is chitin.
Answer:
Cell wall: A cell wall is a structural layer surrounding some types of cells just outside the cell membrane. It can be tough, flexible and sometimes rigid.
Cell membrane : The cell membrane is a biological membrane that separate the interior of all cells from the outside environment which protect the cell from its environment.
Explanation:
I hope it helps you.