Difference Between Mitochondria and Chloroplast (original) (raw)

Last Updated : 23 Jul, 2025

Mitochondria and chloroplasts are two organelles found in eukaryotic cells that are involved in energy conversion and metabolism. While chloroplasts are involved in the process of photosynthesis, where they transform light energy into chemical energy in the form of glucose, mitochondria are in charge of producing energy in the form of ATP through oxidative phosphorylation.

What are Mitochondria?

Mitochondria are membrane-bound organelles that are responsible for producing energy in eukaryotic cells. They are also called the powerhouse of the cell. They produce energy in the form of ATP(adenosine triphosphate).

Also Read: Why are mitochondria known as the Powerhouse of the cell?

Mitochondria

They have a double membrane structure consisting of an outer and inner membrane that is enclosed in a mitochondrial matrix. The outer membrane is Smooth and Porous. The inner membrane is folded in form of cristae. The cristae provide a large surface area for enzymes. The main function of mitochondria is to produce ATP through a process called oxidative phosphorylation.

What is Chloroplast?

Chroloplast is organelles that are found in plants and algae. They are responsible for photosynthesis, in this process light energy is converted into chemical energy in the form of organic compounds.

They have a double membrane envelope-type structure that surrounds the inner aqueous stroma. Stroma contains a network of interconnected thylakoid membranes that are organized into a stack called grana. In the thylakoid membrane, there are pigments like chlorophyll which is responsible for capturing light. They perform photosynthesis, this process involves capturing light energy from the sun and converting it into chemical energy that is used by plants.

Similarities Between Mitochondria and Chloroplast

They both are found in eukaryotic cells.
They both are involved in the energy production of the cell.
Mitochondria and Chloroplast both have their own DNA, and ribosomes and have the ability to replicate independently of the cell.
Both have two membrane structures inner and outer membrane and have a space between them.
Both use electron chains to produce energy.
They both have specialized enzymes for the synthesis of ATP.
This is believed, both evolved from free-living bacteria that were consumed by early eukaryotic cells in a process called endosymbiosis.

Difference Between Mitochondria and Chloroplast

Mitochondria	Chloroplasts
Location	found in almost every eukaryotic cell, including those of animals and plants.	found only in some protists, algae, and plant cells.
Size and shape	usually 1 to 10 micrometers in length and shaped like a sausage.	typically 2 to 10 micrometers long, shaped as a disc or oval,
Membrane structure	consists of an outer and an inner membrane, separated by an intermembrane space.	includes a thylakoid membrane, an inner membrane, and an outer membrane.
Function	uses oxidative phosphorylation to produce ATP.	utilizes photosynthesis to convert light energy to chemical energy.
Pigments	don't contain any pigments	contains pigments such as chlorophyll
DNA	Contains its own circular DNA, which is similar to bacterial DNA.	Contains its own circular DNA, which is similar to bacterial DNA.
Replication	binary fission replication	binary fission or budding replication
Enzymes and pathways	involved in the electron transport chain, the citric acid cycle, and beta-oxidation	involved in the light-dependent and light-independent reactions of photosynthesis
Oxygen dependence	utilizes oxidative phosphorylation, which requires oxygen, to produce ATP.	does not need oxygen but some processes can use it
Endosymbiotic origin	likely descended from an ancestral eukaryotic cell that engulfed a free-living bacterium.	likely descended from an ancestral eukaryotic cell that engulfed a free-living photosynthetic cyanobacterium.