What do you mean by mitochondria ?


Mitochondria are double membrane-bound cell organelles found in most eukaryotic organisms and commonly referred as the ‘powerhouse of the cell’, as it produces the energy necessary for the cell's survival and functioning. The amount of mitochondria in a cell depends on how much energy that cell needs to produce.


Mitochondria have an inner and outer membrane, which are made of proteins and phospholipid with an intermembrane space between them. The outer membrane contains proteins known as porins, which allow movement of ions into and out of the mitochondrion, and also covers the surface of the mitochondrion.

The inner membrane of mitochondria is rather complex in structure and contains a variety of enzymes. It has many folds that form a layered structure called cristae, which helps in increasing the surface area inside the organelle. It is strictly permeable only to oxygen and to ATP molecules.


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Updated on: 29-Mar-2023

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