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Question

Different layers of cell wall are

A
Middle lamella and primary wall
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B
Primary wall and secondary wall
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C
Middle lamella, primary wall and secondary wall
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D
Wall layers exclude middle lamella
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Solution

The correct option is C - Middle lamella, primary wall and secondary wall

  • A cell wall is a tough and flexible structural layer that surrounds cell membrane in plants, algae and most prokaryotes.
  • It consists of the following three layers:-
  1. The primary cell wall is the outermost thin, flexible and extensible layer.
  2. The secondary cell wall is a thick layer present inside the primary cell wall.
  3. The middle lamella is a layer rich in pectins which form plasmodesmata connections between adjacent cell walls.
  • So, the correct answer is 'Middle lamella, primary wall and secondary wall'.



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