(i) Which one of the following is a polysaccharide : starch, maltose, fructose, glucose (ii) Write one difference between alpha-helix and beta-pleated sheet structures of protein. (iii) Write the name of the disease caused by the deficiency of vitamin B_(12).

(i) Which one of the following is a polysaccharide : starch, maltose,

1.	(i) Which one of the following is a polysaccharide : starch, maltose, fructose, glucose (ii) Write one difference between alpha-helix and beta-pleated sheet structures of protein. (iii) Write the name of the disease caused by the deficiency of vitamin B_(12).
Answer» Solution :(i) Starch is a polysaccharide. (ii) `alpha`-hellix: Polypeptide-chcin forms all possible H-bonds by twisting into a right handed helical STRUCTURE with -NH group of each amino acid residue. Hydrogen bonded to the `gt c = 0` group of an adjacent TURN of helix. `beta`-structure : All peptide chain are stretched out to nearly extension and then LAID SIDE by side which are held TOGETHER by intermolecular Hydrogen bond. (iii) Pernicious anaemia and scurvy.