What is the difference between a primary and a secondary cell walls in terms of structure and chemistry?
The primary wall is the cellulose-containing layer laid down by cells that are dividing and growing. To allow for cell wall expansion during growth, primary walls are thinner… Secondary cell walls are responsible for most of the plant’s mechanical support as well as the mechanical properties prized in wood.
What is the structural element of cell wall cellulose hemicellulose?
So, the correct answer is ‘Microfibrils’. Was this answer helpful?
Why is cellulose good for structure and support?
The structure of cellulose makes it good for structure and support because they have β-glucose units. The β-glucose units that make up cellulose are not easily digested by most organisms because they do not have enzymes that can break the bonds between two β-glucose units because they only recognize α linkages.
Why is cellulose structural?
Cellulose is a structural protein in plants and algae. Cellulose fibers are enmeshed in a polysaccharide matrix to support plant cell walls. Plant stems and wood are supported by cellulose fibers distributed in a lignin matrix, where the cellulose acts like reinforcing bars and the lignin acts like concrete.
What are the difference between primary and secondary cell walls?
The primary wall is arranged inner to the middle lamella. The secondary wall is arranged inner to the primary wall. It is produced in the young growing cell. It is produced when the cell has stopped growing.
What is difference between primary cell and secondary cell?
The major difference between a primary cell and the secondary cell is that primary cells are the ones that cannot be charged but secondary cells are the ones that are rechargeable.
How is the structure of hemicellulose different to cellulose?
Cellulose is made up of glucose monomers while hemicellulose is made up of several polymers. Cellulose is a linear polymer whereas hemicellulose is a cross-linked polymer. The main difference between cellulose and hemicellulose is the role of each polysaccharide in the plant cell wall.
How cellulose are organized and arranged as a structure?
Cellulose is an unbranched molecule. The polymeric chains of glucose are arranged in a linear pattern. Unlike starch or glycogen, these chains do not undergo any coiling, helix formation or branching. Rather, these chains are arranged parallel to each other.
Why are cellulose strands better as a structural carbohydrate?
As shown in Figure 7, every other glucose monomer in cellulose is flipped over, and the monomers are packed tightly as extended long chains. This gives cellulose its rigidity and high tensile strength—which is so important to plant cells.