In eukaryotes the electron transport chain is composed of a series of electron carriers located in the blank of mitochondrion

In eukaryotes, the electron transport chain is composed of a series of electron carriers located in the inner membrane of the mitochondrion

The electron transport chain is composed of four large, multiprotein complexes. These protein complexes are formed of a series of electron carriers.

These complexes are embedded in the inner mitochondrial membrane and two small diffusible electron carriers shuttling electrons between them.
These transfer electrons from electron donors to electron acceptors via redox reactions and joins this electron transfer with the transfer of protons across a membrane.

Thus, in eukaryotes, the electron transport chain is composed of a series of electron carriers located in the inner membrane of the mitochondrion

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