Mitochondria: Mitochondria (singular: Mitochondrion) are double membrane-bounded structures found only in Eukaryotes. They are the sites for Aerobic respiration and are the major energy production centers.

Structure of Mitochondria:

The outer membrane of mitochondria is smooth but the inner membrane forms many infoldings called cristae (singular: crista) in the inner mitochondrial matrix. They serve to increase the surface area of the inner membrane on which membrane-bound reactions can take place.

Functions of Mitochondria:

Mitochondria have their DNA and ribosomes, and those ribosomes are more similar to bacterial ribosomes than eukaryotic ribosomes.