Cellulose's Role in Plant Cell Wall Strength

Steps:

• Identify cellulose as a beta-1,4-linked glucose polymer forming rigid plant cell walls.
• Evaluate statements: assume 1 involves branched structure (false for cellulose), 2 unbranched chains enabling hydrogen-bonded microfibrils for tensile strength, 3 alpha linkages (incorrect, beta linkages prevent digestion and allow linearity).
• Confirm only statement 2 adapts cellulose for mechanical support against turgor pressure.
• Select option matching sole correct statement.

Not enough information: Statements 1, 2, and 3 not provided, preventing full verification.

Why D is correct:

• Cellulose's unbranched beta-linked chains (statement 2) form strong, insoluble fibers via hydrogen bonds, ideal for rigid structural support per polysaccharide structure-function principles.

Why the others are wrong:

• A includes all, but 1 and 3 misrepresent cellulose's linear beta structure.
• B includes 1 and 3, ignoring 1's likely error on branching or linkage type.
• C includes 3, which probably confuses beta with alpha glucose bonds.

Final answer: D