Achromosome has an inversion which describes a paracentric inversion

Answer;

Switching of genes around the centromere.

Explanation;Inversion is a type of chromosome rearrangement in which chromosome segment is inverted end to end. There is no deletion or addition of segments, segments just change invert in the chromosome. An inversion occurs when a single chromosome undergoes breakage and rearrangement within itself.There are two types of inversions - paracentric and pericentric. Paracentric inversion does not include centromere. Genes are switched within one of the arms of the chromosome, while a pericentric inversion includes centromere, so genes are switched around it.

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it

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.