Question

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

starch,maltose,fructose,glucose

(ii) Write one difference between β-helix and α-pleated sheet structures of protein. 

(iii) Write the name of the disease caused by the deficiency of vitamin B₁₂.

Answer 1

(i) Starch.

(ii) α- Helix polypeptide chains are stabilized by intramolecular H-bonding whereas β-pleated sheet is stabilized by intermolecular H-bonding.

(iii) Pernicious anaemia.