Q. Of what units are the nucleic acids constituted? What are chemical entities that compose that unit?
The Nucleic acids are formed by sequences of nucleotides.
Nucleotides are constituted by one molecule of sugar (deoxyribose in ribose and DNA in RNA) bound to one molecule of phosphate and to one nitrogen-containing base (adenine, uracil, guanine or cytosine, in RNA, and adenine, cytosine, thymine and guanine, in DNA).