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Question

The cell wall composition is of


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

The correct option is A 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.

Biology

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