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Question
I am a complex sugar found in plants responsible for hardening of sclerenchyma. I am ____.
I am a complex sugar found in plants responsible for hardening of sclerenchyma. I am ____.
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Solution
The correct option is A lignin
Lignin is present in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts. It provides strength to the plant parts and is part of the secondary thickening of tall plants. It is a major constituent of woody material. The cells of sclerenchyma are dead, long and narrow. Their walls are thickened due to the presence of lignin. It acts as a cement and hardens them. Often these walls are so thick that there is no internal space inside the cell.
Lignin is present in stems, around vascular bundles, in the veins of leaves and in the hard covering of seeds and nuts. It provides strength to the plant parts and is part of the secondary thickening of tall plants. It is a major constituent of woody material. The cells of sclerenchyma are dead, long and narrow. Their walls are thickened due to the presence of lignin. It acts as a cement and hardens them. Often these walls are so thick that there is no internal space inside the cell.
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