Question

The cell walls of sclerenchyma tissue have deposits of
A. Lignin
B. Hemicelluloses
C. Cellulose
D. All of the above

Answer 1

Hint: Sclerenchyma tissues have dead cells. It provides structural support to the plants. It is found in the cortex of stems. Lignin and cellulose helps to provide them with a strong and rigid appearance. Cellulose microfibrils are present in a matrix of hemicelluloses and lignin.

Complete answer:
Sclerenchyma tissues are mainly composed of dead cells. They have a heavily thickened wall. The composition of lignin and high cellulose content (60 to 80 percent). It also serves the function of providing structural support in plants. They have mainly two types of walls: primary and secondary walls. Sclerenchyma tissues are mainly found in the cortex of stems and in leaves. The size, shape, and structure vary greatly.
Sclerenchyma tissues are hard, rigid, and somewhat brittle. Collenchyma tissue includes mature cells. sclerenchyma cells are mainly of two types: fibers and sclereids. Fibers are greatly elongated cells. They provide support to a plant. Fibers are found almost anywhere in the plants. These can occur as vascular bundles or strands. Seed hairs, leaf hairs, and bast fibres have many commercial importances. Sclereids are present in various tissues of the plant, such as the periderm, cortex, pith, xylem, and phloem.
Cellulose is mainly found in plant cell walls and helps the plant to be stiff and strong.
From the above information we have found that the cell walls of sclerenchyma tissue have deposits of lignin, hemicelluloses and cellulose.

Hence, the correct answer is option (D).

Note: Other fundamental tissues in plants are: parenchyma (living thin-walled tissue) and collenchyma (living support tissue with irregular walls). Fibers of sclerenchyma tissues can be used as raw material for textiles and other woven goods. The hard shells of nuts and the outer hard coat of many seeds are sometimes called stone cells. Cellulose cannot be digested by humans.