Which biological macromolecule functions as the primary structural component of plant cell walls, consisting of unbranched linear chains of -D-glucose linked by glycosidic bonds?
Answer and explanation
Correct answer: B. Cellulose
- Step 1: Cellulose is a structural polysaccharide composed of linear, unbranched chains of glucose molecules linked by bonds.
- Step 2: Hydrogen bonding between adjacent parallel chains forms rigid microfibrils providing tensile strength to plant cell walls.
Answer
Cellulose.
Why not the others: 'Glycogen' is the branched and energy storage polysaccharide in animals; 'Starch' is the helical energy storage polysaccharide in plants; 'Chitin' forms fungal cell walls and arthropod exoskeletons.
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