Vitamins are complex organic molecules.They can be broadly classified as:
(i) Water soluble vitamins: These include vitamin B-complex and vitamin C.
(ii) Fat soluble vitamins: These are oily substances that are not readily soluble in water. However, they are soluble in fat. These include vitamins A,D,E and K. Nucleic acids are bipolar (i.e. polymers present in the living system). They are also called polynucleotides since the repeating structural unit of nucleic acids is a nucleotide.
General structure of a Nucleotide can be given as:
