Mitochondria
The function of Mitochondria:

Some main points are given below.

1. The Mitochondria perform the most important function such as Oxidation, Dehydrogenation, Oxidative phosphorylation and the respiratory chain of the cell.

2. Their structure and enzymatic system are fully adapted for their different functions.

3. They are actual respiratory organs of the cells where the foodstuffs; i.e., carbohydrates and fats are completely oxidized into CO2 and H2O.

4. During the biological oxidation of the carbohydrates and fats, a large amount of energy is released which is utilized by the Mitochondria for the synthesis of the energy-rich compound known as ATP(adenosine triphosphate).

5. In animal cell Mitochondria produce 95% of energy(ATP) molecules, the remaining 5% is being produced during anaerobic respiration outside the Mitochondria.
In-plant cell, ATP is also produced by the chloroplast.

 More detail about Mitochondria:https://megieal.blogspot.com/2019/09/mitochondriahistorydistributionmorpholo.html