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Q.

Which of the following statements are correct?
(i) Chitin, a complex homopolysaccharide occuring in exoskeleton consists of NAG
(ii) Glucosamine and N – acetyl glucosamine are modified sugar.
(iii) Cellulose shows blue colour when treated with I2 .
(iv) Starch in plants and glycogen in animals are store houses of energy
(v) Right end of polysaccharide is called reducing end while left end is called nonreducing end.

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a

All except (v)

b

(i), (ii) and (iii)

c

(iii), (iv) and (v)

d

All except (iii)

answer is C.

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Detailed Solution

Chitin is a complex homopolysaccharide present in cell wall of fungi and exoskeleton of arthropods. Glucosamine and N-acetylglucosamine are modified sugars (amino sugars), Cellulose doe not show blue color upon treating with I2KI solution. Starch and Glycogen are storage polysaccharides. Right end of a polysaccharide if reducing and left end is non-reducing end

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Which of the following statements are correct?(i) Chitin, a complex homopolysaccharide occuring in exoskeleton consists of NAG(ii) Glucosamine and N – acetyl glucosamine are modified sugar.(iii) Cellulose shows blue colour when treated with I2 .(iv) Starch in plants and glycogen in animals are store houses of energy(v) Right end of polysaccharide is called reducing end while left end is called nonreducing end.