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Q: In plants, _____ is present in middle lamella, primary cell and secondary walls and accumulates during the initial stages of growth during cell expansion.
  • A. Chitin
  • B. Alginate
  • C. Gelatin
  • D. Pectin
Correct Answer: Option D - Pectin is the component that is present in the middle lamella of plant cells. It acts like glue to bind the cells together and accumulates during the initial stages of growth during cell expansion. Pectin is highly hydrophilic meaning it can absorb water, which is essential for cell expansion during growth.
D. Pectin is the component that is present in the middle lamella of plant cells. It acts like glue to bind the cells together and accumulates during the initial stages of growth during cell expansion. Pectin is highly hydrophilic meaning it can absorb water, which is essential for cell expansion during growth.

Explanations:

Pectin is the component that is present in the middle lamella of plant cells. It acts like glue to bind the cells together and accumulates during the initial stages of growth during cell expansion. Pectin is highly hydrophilic meaning it can absorb water, which is essential for cell expansion during growth.