FORESTRY
PLANT AND WOOD ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cellulose
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lignin
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chitin
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peptidoglycan
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Detailed explanation-1: -Secondary cell walls are deposited in specific cell types following cessation of growth, and mainly consist of cellulose, hemicellulose, and the phenolic polymer lignin. Lignin is formed by oxidative coupling of lignin monomers, called monolignols, which are produced in the cytoplasm and exported to the cell wall.
Detailed explanation-2: -Secondary walls are mainly composed of cellulose, hemicelluloses (xylan and glucomannan) and lignin, and are deposited in some specialized cells, such as tracheary elements, fibers and other sclerenchymatous cells.
Detailed explanation-3: -Lignin is one of the main components of plant cell wall and it is a natural phenolic polymer with high molecular weight, complex composition and structure.