Genomic-things
The study of genomic-things is called biology. A genome is a complete set of a species characteristic number of DNA molecules or RNA in some biological viruses. Every individual genomic-thing of all species possesses a genome. A genomic-thing that does not possess a genome does not exist in this world. In our body one chromosome contains only one molecule of DNA. Each cell in our body has 46 chromosomes and therefore, each cell in our body contains 46 DNA molecules. Thus, the size of human (i.e., of Homo sapiens) genome is 46 DNA molecules.