Each mitochondria is a double membrane bound structure with the outer membrane and the inner membrane dividing its lumen distinctly into two aqueous compartments.
It is the site of aerobic respiration. It produces cellular energy in the form of ATP, hence called as 'power house' of the cell.
Nucleus, Mitochondria and Plastids contain DNA. Mitochondria and plastids are called semi autonomus because they can form some of the proteins using their own DNA . Vacuoles and lysosomes do not conatin DNA.