Mitochondria are organelles found in most eukaryotic cells that provide energy for cellular processes. They convert glucose into ATP through a process that takes place on the inner mitochondrial membrane and its cristae which increase surface area for reactions. Mitochondria contain their own DNA and protein-producing machinery within the inner membrane and matrix. They rely on chloroplasts as an ally to provide the glucose needed to create energy, and have a double membrane structure with an outer membrane that acts as a filter and inner membrane where energy production occurs.