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BIO NMDCAT CELL STRUCTURE & FUNCTION
nmdcat.online July 3, 2026

18. The major structural component that reinforces the secondary cell wall of mature, woody plant cells, providing extreme compressive strength, is

A. Pectin
B. Cellulose
C. Lignin
✓
D. Suberin

📝 Explanation

Lignin is a complex, non-carbohydrate aromatic polymer deposited in secondary plant cell walls, rendering them woody, waterproof, and rigid.

📖 Additional Information

  • Pectin
  • Cellulose
  • Lignin
  • Suberin

Lignin is a complex, non-carbohydrate aromatic polymer deposited in secondary plant cell walls, rendering them woody, waterproof, and rigid.

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