Question

Cell walls of sclerenchyma are rich in

• A. Cellulose
• B. Pectin
• C. Lignin
• D. Hemicellulose

Answer 1

The correct option is C

Lignin

The correct option is C:

Explanation of correct option:

1. Sclerenchyma cells are dead cells.
2. On the walls of sclerenchyma cells unthickened areas are present which are called pits.
3. When sclerenchyma cells matured they become dead because of the thickening of lignin on the cell wall.

Explanation of incorrect option:

Option A: The thickening of the cell wall of collenchyma cells is made up of cellulose and pectin.

Option B: The cell wall of collenchyma cells is composed of pectin and cellulose.

Option D: Hemicellulose is also present in the collenchyma cell wall.

Final Answer: Hence, Cell walls of sclerenchyma are rich in lignin.