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Question

The mechanical properties of sclerenchyma is due to

A
cellulose
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B
pectin
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C
lignin
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D
suberin
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Solution

The correct option is C lignin
Lignin is a very complex organic compound that is found deposited on tissues such as sclerenchyma and xylem. It is insoluble in water and offers rigidity to the plant. It is the second most abundant organic substance found naturally after cellulose.

Cellulose is a complex polysaccharide that is a major component of the cell wall of all photosynthetic plants.

Pectin is deposited on the cell walls of collenchymatous cells. It provides elasticity and tensile strength to the plants.

Suberin is a waxy impermeable substance that is found deposited on the cork cells. This substance is impervious to air and water.

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