Historic Downtown Bridgeport. In 2006 Bridgeport was named a Texas Main Street City and has been recognized as a National Main Street City since 2007. This prestigious recognition shows that the City and its residents are committed to preserving our historic business district, both architecturally and economically.
The cell nucleus contains the majority of the cell's genetic material in the form of multiple linear DNA molecules organized into structures called chromosomes. Each human cell contains roughly two meters of DNA.
Most of an organism's DNA is stored in chromosomes inside the nucleus. Mitochondria. Mitochondria are structures inside of a cell where chemical energy is generated from food. A small amount of DNA in eukaryotes, called mitochondrial DNA or mtDNA, is housed in the mitochondria. Single-Celled Organisms Prokaryotes are single-celled organisms that lack a nucleus.