Which of the following are the main constituents of cell wall?a)Celluloseb)Pectinc)Starch.d)ProteinCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

In the primary (growing) plant cell wall, the major carbohydrates are cellulose, hemicellulose and pectin. The cellulose microfibrils are linked via hemicellulosic tethers to form the cellulose-hemicellulose network, which is embedded in the pectin matrix.

Answer

Cellulose.(Cellulose is poly- sachrides whose structure is not linear and simple like starch. So it is not easy to break in simpler form like glucose or fructose. Human can't able to digest cellulose but animals digest it) .

Answer

The main constituent of the cell wall is cellulose. Cellulose is a complex carbohydrate and is made up of long chains of glucose molecules linked together. It is the most abundant organic compound in the world and plays a crucial role in the structure and function of plant cell walls.

Cellulose is a major component of plant cell walls and provides strength and rigidity to the cell. It forms a mesh-like structure that surrounds the cell membrane and provides support to the plant. The cellulose fibers are arranged in a crisscross pattern, which gives the cell wall its strength and prevents it from collapsing under pressure.

The cell wall also contains other components such as hemicellulose, lignin, and proteins, but cellulose is the main constituent. Hemicellulose is a group of complex carbohydrates that forms a matrix with cellulose, providing additional strength to the cell wall. Lignin is a complex polymer that adds rigidity and waterproofing properties to the cell wall. Proteins are also present in the cell wall and play a role in cell adhesion, signaling, and defense against pathogens.

Other components such as pectin and starch are not major constituents of the cell wall. Pectin is a complex carbohydrate found in the middle lamella, the region between plant cells, and is involved in cell adhesion. Starch is a storage form of energy in plants and is primarily found in plastids such as chloroplasts.

In conclusion, the main constituent of the cell wall is cellulose. Cellulose provides strength and rigidity to the cell wall and is the most abundant organic compound in the world. Other components such as hemicellulose, lignin, and proteins are also present in the cell wall but cellulose is the primary structural component. Pectin and starch are not major constituents of the cell wall.

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