Select the correct statement regarding cell wall of plant cells.

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Primary cell wall is chiefly composed of a soluble fibrous polysaccharide called suberin.

Secondary cell wall is mainly composed of lignin and is deposited on the outer surface of primary wall.

Pits are present in primary walls whereas they are absent in secondary walls.

The primary cell walls of adjacent cells are cemented through middle lamella which is composed of calcium pectate.

answer is D.

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Detailed Solution

Matrix of primary wall mainly consist of water, hemicellulose and glycoproteins. In plants, secondary wall is laid inner to primary wall. Pits are usually absent in a primary wall whereas they often occur in the secondary wall. Cells of a plant tissue are glued by Calcium Magnesium pectate.

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