Which of the following statements are correct? (i) Chitin, a complex or heteropolysaccharide 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 non-reducing end.

Question

Which of the following statements are correct? (i) Chitin, a complex or heteropolysaccharide 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 non-reducing end. (A) (i), (ii) and (iii) (B) (iii), (iv) and (v) (C) All except (iii) (D) All except (v)

Tardigrade Admin · Accepted Answer

Starch can hold iodine ( I 2) molecules in its helical secondary structure but cellulose being non helical, cannot hold I2. Thus, cellulose does not shows blue colour when treated with I 2.

(i), (ii) and (iii)

(iii), (iv) and (v)

All except (iii)

All except (v)

Starch can hold iodine (I2​) molecules in its helical secondary structure but cellulose being non helical, cannot hold I2​. Thus, cellulose does not shows blue colour when treated with I2​.

Starch can hold iodine $(I_{2})$ molecules in its helical secondary structure but cellulose being non helical, cannot hold $I_{2}$ . Thus, cellulose does not shows blue colour when treated with $I_{2}$ .