Answer :
Electron transport chain is a chemical reaction where end products are to form large amount of ATP from NADH and FADH₂.
Electron transport chain takes place in inner mitochondrial matrix.
There are 4 complexes in ETS,
complex I - NADH dehydrogenase complex
complex II - succinate dehydrogenase complex
complex III - cytochrome b - c1 complex
complex IV - cytochrome oxidase
complex V - ATP synthase
complex I, III, IV takes place in releasing H+ Ion in the intermembrane of mitochondria.
Molecules from Kreb cycle and glycolysis are used to form ATP.
The electrons are transferred from complex I to complex IV releasing H+ ion in the inner mitochondrial membrane, this to create proton pump to form ATP with the help of ATP synthase
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