Question

The cell wall composition is of

• A. Cellulose and proteins
• B. Hemicellulose and pectin
• C. Microfibrils
• D. All of the above

Answer 1

Answer: (D)

All of the above

The cell wall is the outer rigid protective covering of plant cells, fungal cells and prokaryotes and represents a specialised form of extracellular matrix closely associated with the external cell surface. A plant cell is surrounded by a well developed cellulosic cell wall. The plant cell wall is made up of a gel-like matrix and fine fibrils called microfibrils. Matrix consists of hemicellulose (5 - 15%), pectin (2 - 8%), glycoproteins (1 - 2%), lipids (0.5 to 3%) and water. Microfibrils constitute 20 to 40% of the cell wall. Microfibrils are made of cellulose in plant cells. Thus, the correct answer is option D.