Question

Use the following figure to describe the electron transport chain. What is the last electron acceptor?

PROCESS: ELECTRON TRANSPORT CHAIN Intermembrane space H H H H H H H + H H+ H+ H H H" H H Η* Η' H+ H" H Η" H+ H H H H H H+ H H+ H+" Η' Η' H H.com lex H+ H+ H Membrane of cristae Complex IV DODIK 6- Cytcem have for you were complex withoutwedi OD വI ( വിവാ complex permeni sicer Mitochondrial matrix Complex NADH H+ FARHplex I 28" + 2H+ +12° Complex IV Complex III HO FAD NAD+ What goes in: What comes out:...

Answer 1

Oxygen is the final electron acceptor.

In the first step, the complex 1 oxidises the NADH and transfer the electron in electron transport chain.

Then in complex 2, the oxidation of FADH2 provides the electrons to electron transport chain

Then the flow of electron occurs in the electron transport chain. This helps in translocation of proton (H+) ion from the mitochondrial matrix to the inner mitochondrial membrane space.

At last in complex 4, the electron combines with oxygen to produce water.

that's why the oxygen is the right answer.