Assertion :The exoskeleton of arthropods is made up of complex polysaccharide called chitin. Reason: Plant cell walls are made of cellulose.

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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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Polysaccharides are complex carbohydrates which are formed by polymerisation of large number of monosaccharide monomers. Exoskeletons of arthropods, contain a complex polysaccharide called chitin. These complex polysaccharides are heteropolymers. Plant cells walls are made up of cellulose paper made from plant pulp and cotton fibre is cellulosic. Cellulose is homopolysaccharide.
So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.

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