Answer:
True
Step-by-step explanation:
Cellulose is found throughout the cell walls of plant cells.
Every cell is surrounded by a cell membrane. Cell wall encloses the cell with the cell membrane. Cell wall is the structure which is supposed to protect the cell.
Cell wall in plants is made up of cellulose. Cellulose is a specific sugar which does not dissolve in water. This allows cellulose in cell wall to form long chains which is called polymers. Cellulose polymers are present throughout the cell wall of the plants.
Cellulose cell wall protects the plant from outside attacks from harmful microbes.
Cellulose cannot be digested or broken down to produce energy. Only herbivores have special bacteria which can help in digestion of cellulose.
Cellulose makes cell walls rigid.
Cellulose does not dissolve in water like other sugars. It is not easily broken down. Hence, cell wall made up of cellulose have more strength.
The cellulose cell wall is not bent; it is rigid.
Rigid cell wall gives support to the plant cell and keep the plant erect.
Plant cell wall is made up of three layers.
Every plant cell consists of two layers. The third and the innermost layer is not mandatory for each plant cell.
The outermost layer is the middle lamella. This is made up of pectin. Pectin help in binding the cell wall of two adjacent cells.
The middle layer is the primary cell wall.
This is made up of cellulose. This layer provides mechanical strength and flexibility which permits growth of the cell.
The secondary cell wall lies between the primary cell wall and the plasma membrane.
Once the primary cell wall stops growing, it may continue and form the secondary cell wall. This is a rigid layer and provides support to the cell.
Lignin is also present in the secondary cell wall along with cellulose.