A mitochondrion is an organelle found in the cells of most eukaryotes, such as animals, plants and fungi. Mitochondria have a double membrane structure and use aerobic respiration to generate adenosine triphosphate, which is used throughout the cell as a source of chemical energy.

1. MITOCHONDRIA : THE
POWER HOUSE

3. STRUCTURE:-
This cell organelle has several parts. They are as follows-
(I) Outer Membrane:- It is the outermost part of
Mitochondria. It consist of Porin channel s in it which
helps to pass several molecules through it.
(II) Inner Membrane:- It is present below the outer
membrane in the Mitochondria.
(III) Peri-mitochondrial space:- It is present in between
outer membrane and inner membrane.

4. (IV) Cristae:- It is made by folding the inner membrane
inside. It looks like finger. Here, Crystalline protein is present.
Here F1 particles are also known as oxysomes . These particles
are present in matrix side of mitochondrial inner membrane. In
mitochondria, F1 particles function in synthesizes ATP from
ADP + Pi. F1 particles comprise about 15% of the total inner
membrane protein.
(V) Matrix:- It consist of Plasma ( water molecules, solid
particles) and circular DNA, RNA, Ribosome, Protein and
Enzymes

6. Enzymes in Mitochondria:-
(a) Inner Membrane :-
NADH DEHYDROGENASE
SUCCINATE DEHYDROGENASE
(b) Outer Membrane:-
MONO AMINE OXIDASE
(c) Peri-mitochondrial Space:-
ADENYLATE CYCLASE
(d) Matrix:-
CITRATE SYNTHETASE
MALLET DEHYDROGENASE

7. Function:-
(I)Signalling through mitochondrial reactive oxygen
species.
(II)Regulation of the membrane potential.
(III)Apoptosis-programmed cell death.
(IV)Calcium signalling
(V)Regulation of cellular metabolism.
(VI)Certain hemi synthesis reactions
(VII)Steroid synthesis.