List four different ways in which scientists can manipulate dna

1) copying genes
2) chemical mutagens
3) computers
4) enzymes
5) bacteria

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.