Fibers · Botany

The structural units that provide strength to plant fibers are primarily composed of:

  1. Lignin only
  2. Pectin
  3. Starch
  4. Cellulose
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Correct answer: Cellulose

Plant fibers are elongated sclerenchyma cells with thick walls composed mainly of cellulose. The arrangement of cellulose microfibrils determines the strength and flexibility of the fiber.

Difficulty: Medium Question 14 of 20

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