Both and generate the same amount of ATP

Neither nor are involved in ATP production in electron transport

Oxygen

Water

Ubiquinone

Cytochrome c

Enzyme complex IV

FADH2 enters the ETC at a later point than NADH

FADH2 provides fewer electrons than NADH

FADH2 is imported from the cytoplasm, which causes it to lose some of its energy

FADH2 is a smaller molecule

They continuously pump protons from the mitochondrial matrix into the intermembrane space

They export protons into the cytoplasm

Scaffold proteins carry protons from the mitochondrial matrix into the intermembrane space

They import protons from the cytoplasm

an iron atom

a copper atom

a hydrogen atom

water

oxygen gas

Oxygen acts as the final electron acceptor at the end of the electron transport chain

Oxygen is directly necessary for the completion of the Krebs cycle

Oxygen accepts the protons that flow through ATP synthase and helps return them to the intermembrane space

Oxygen donates electrons, which are used during the electron transport chain

Inner mitochondrial membrane

Outer mitochondrial membrane

Cytosol

Intermembrane space

Cell wall

Oxidative phosphorylation

Glycolysis

The Krebs cycle

Electron transport chain