Deoxyribonucleic Acid is the inherited substance in all humans and every cell in the human body has identical DNA and DNA is found in the cell nucleus and small part of mitochondria and the nucleus is nothing but its called nuclear DNA. Here Mitochondrial DNA transforms the energy from food into the form of cells. DNA is having some chemical bases like adenine(A), guanine(G), cytosine (c), and thymine (T), based on these chemical bases DNA bases pair up with each other like A T C with G and each DNA bases has some molecular like sugar and phosphate and simultaneously, a base, sugar, and phosphate are known as a nucleotide. And human DNA embraces about 3 billion bases from that the bases of all people more than 99 percent literally the same. Another important possession of DNA is that it can recreate, instead erect copies of itself. Each strand of DNA in the dual spiral can serve as a pattern for identifying the sequence of bases, but its analytical cells divide for the reason that each new cell needs to have a precise copy of the DNA present in the old cell.