Question

Mechanical strength of a cell wall is due to deposition of

• A. Cellulose
• B. pectin
• C. Lignin
• D. Tannin

Answer 1

The correct option is A Cellulose

• The plant cell wall derives its strength from the cellulose deposition.
• The mechanical strength of plant cell walls is mainly due to the presence cellulosic microfibrils.
• Apart from these, a plant consists of ground tissues such as collenchyma and sclerenchyma which provide mechanical strength to the growing plants.
• The collenchyma cells are thickened with pectin, hemicellulose, protein and cellulose.
• Sclerenchyma is a dead tissue with a lignified cell wall.

So, the correct answer is 'Cellulose'.