DNA, or deoxyribonucleic acid, is a huge molecule that contains all the info that defines you, your structure, your functionality. DNA is spread out in 23 chromosomes, which are strains of DNA in the nucleus of our cells. Each chromosome is build out of genes which are strings of nucleotides (adenine, thymine, guanine, cytosine ).
The DNA is 2 meters long and contains 3 GB of data. Also, 100 000 genes from DNA, RNA and so on can be traced back to viruses whereas we know a bit only about 21 000 of those genes.
DNA has also a key role in evolution and mytochondrial DNA can be traces back to the first “Eve”, as this type of DNA is sent to the off springs via their mothers only. DNA is certainly an incredible book of life here on Earth.