BIO NMDCAT CELL STRUCTURE & FUNCTION

nmdcat.online July 3, 2026

28. The biochemical compound that acts as a major matrix component in the primary cell wall, forming a hydrated gel that controls wall porosity and cell expansion, is

A. Lignin

B. Pectin

✓

C. Suberin

D. Chitin

📝 Explanation

Pectins are branched, hydrophilic polysaccharides that bind water and calcium ions, creating a flexible, hydrated gel matrix in primary walls.

📖 Additional Information

Lignin
Pectin
Suberin
Chitin

Pectins are branched, hydrophilic polysaccharides that bind water and calcium ions, creating a flexible, hydrated gel matrix in primary walls.

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