Assertion :A cell wall is differentially permeable Reason: In plants, primary cell wall is made up of cellulose ( $β$ -D-glucose units), hemicellulose and pectin

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is D Assertion is incorrect but Reason is correct.
A plant cell is surrounded by a rigid cellulosic cell wall. It is dead at maturity. The plant cell wall is fully impermeable and cannot regulate the entry of solvent or solutes. The cell wall consists of two parts gel-like matrix and fine fibrils called microfibrils. The matrix consists of hemicellulose, pectin, glycoprotein, lipid, and water. Microfibrils are made of cellulose. Thus, the correct answer is option D.

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