Mitochondria have two membranes, one that is internal and the other that is external.
Cristae are layered structures in the inner membrane.
The organelle is protected by an outer membrane.
The mitochondrion's surface is protected by an outer membrane.
Phospholipid layers make up these membranes.
Mitochondria use a series of chemical events to convert glucose into adenosine triphosphate (ATP), an energy molecule that is used to power a variety of cellular operations.