(i) Polysaccharides are carbohydrates which yield a large number of monosaccharide units on hydrolysis. Starch is a polysaccharide, maltose is oligosaccharide and fructose, glucose are monosaccharide.
(ii) One difference between -helix and -pleated sheet structures of protein is that in β-structure all peptide chains are held together by intermolecular hydrogen bonds and in -helix peptide chains are held together by intramolecular hydrogen bonds.
(iii) Anemia is the disease caused by the deficiency of vitamin B12.
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