Question

The middle lamella is composed of –
(a) pectates (b) cellulose
(c) lignin (d) proteins

Answer 1

The middle lamella:

• Option “A” is correct i.e. pectates.

• The middle lamella is composed of pectates.

• The cell plate that is made during cell division itself changes into middle lamella or lamellum. The middle lamella is comprised of calcium and magnesium pectates. In a mature plant cell, it is the uppermost layer of the cell wall.

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Answer 2

The middle lamella is composed of Pectates.

Option (a).

Explanation:

• The middle lamella is composed of calcium and magnesium pectates.

• The middle lamella contains a pectin layer.

• The walls of the cells are separated by a mid-layer or a middle lamella.

• In addition, the central lamella is a cemented layer between two plant cells.

• The pectins form a united and connected layer between adjacent cells.

• A cell of a plant is characterised by a cellulose cell wall.

• It is absent on the outer layer.

• Middle lamella consists of pectin salts of calcium and magnesium.

• Pectins, which occur in the walls of plant cells, are mucopolysaccharides.

• Pectic acid is a polymer of the D-galacturonic acid.

Learn more about the middle lamella

What is middle lamella?

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What is the meaning of the cell wall and the middle lamella may be traversed by plasmodesmata?  

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