What chemical compound is the primary constituent of cotton fiber __________________?
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Answer: B. Cellulose
Explanation
Cellulose is a natural polysaccharide and serves as the primary structural component of cotton fibers. Botanical cell walls in cotton bolls synthesize pure cellulose microfibrils to achieve remarkable tensile strength. The correct option identifies cellulose as the essential chemical constituent composing natural cotton fibers. Cellulose is a linear polymer composed of D-glucose units linked together by beta-1,4-glycosidic chemical bonds. Cotton fiber represents one of the purest natural sources of cellulose, containing over ninety percent of the biopolymer. Extensive intermolecular hydrogen bonding between cellulose chains gives cotton its strength and absorbent properties.
Option A is lignin, which is a complex phenolic polymer found in woody plant cell walls, not cotton fibers. Option C is starch, which is an alpha-linked glucose polymer used for plant energy storage rather than structural fiber. Option D is gelatin, which is a protein derived from animal collagen rather than a plant-based carbohydrate.
- Subject
- Engineering
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- Chemical Engineering
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- —
- Difficulty
- medium
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