Mitochondrial deoxyribonucleic acid (DNA) is found in the mitochondria of a eukaryotic cell; it is composed of 37 genes that are necessary for the mitochondria's function. Nuclear DNA, on the other hand, is found in the nucleus of a cell and is composed of 46 chromosomes that contain hereditary genetic information.
DNA is composed of the nucleotides adenine, thymine, guanine and cytosine, and it is found in the cells of eukaryotic organisms. A sequence of six nucleotides form a gene that is then able to synthesize a specific protein. Nuclear and mitochondrial DNA are present in an organism and work together to synthesize proteins vital to life and provide the cell with energy.