In plant cell walls, the tensile strength of the walls is provided by _____________.
A
Cellulose
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B
Lignin
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C
Pectin
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D
Extensin
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Solution
The correct option is B Cellulose The cellulose molecules provide tensile strength to the primary cell wall. Each molecule consists of a linear chain of at least 500 glucose residues that are covalently linked to one another to form a ribbonlike structure, which is stabilized by hydrogen bonds within the chain.