In gel electrophoresis, dna fragments move across a gel. describe what cause them to move in (2-3) sentences

DNA is negatively charged. Therefore, when you use gel electrophoresis the molecules will be attracted to the positive pole. Smaller fragments move further than longer fragments.

The correct answer is c

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.