what material is cell draw for requirement and from where
Answers
Answer:
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.
Regulates 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.
It allows entry of smaller molecules through it freely.
Explore More: Plant cell
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:
Protecting the integrity of the interior cell.
Providing support and maintaining the shape of the cell.
Helps in regulating cell growth through the balance of endocytosis and exocytosis.
The cell membrane also plays an important role in cell signalling and communication.
It acts as a selectively permeable membrane by allowing the entry of only selected substances into the cell.
Also Read: Animal Cell
Difference between Cell Wall and Cell Membrane
One of the fundamental differences between the plasma membrane and the cell wall is in the type of organisms that they are found. The cell wall is present only in plants and the cell membrane is present in every living organism including plants.
CELL WALL
CELL MEMBRANE
Present only in plants and in some fungi, bacteria, algae. Present in all types of cells, in humans, animals, plants, bacteria, etc.
It is the outermost part of the plant cell It is the outermost covering the animal cells
It is made up of pectin, chitin, lignin, glycoproteins, glycolipids, sugar, and cellulose. It is a lipid bilayer. And is composed of lipoproteins and carbohydrates.
The cell wall is 0.1 μm to several μm in thickness The cell membrane is 7.5–10 nm in thickness
It is the thick and rigid structure with a fixed shape. It is a thin and delicate structure. It is flexible to change the shape as needed.
It protects the cell from the external environment. It protects and maintains the internal environment of the cell.
The cell wall is metabolically inactive The cell membrane is metabolically active.
The cell wall grows in thickness over time. Further, it occupies the whole cell in the plant as the cell ages and dies. It is of the same thickness for the lifetime of the organism.
The cell wall is fully permeable to smaller molecules with the size of 30-60 kDa. The membrane is selectively permeable and controls the