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  4. During aerobic respiration, the passing on of the electrons removed as a part of the hydrogen atom to molecular O2 occurs in the .

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Q. During aerobic respiration, the passing on of the electrons removed as a part of the hydrogen atom to molecular $O_{2}$ occurs in the __________.

NTA AbhyasNTA Abhyas 2020Respiration in Plants

Solution:

Mechanism of ATP production : When the electrons pass from one electron carrier to another carrier
(from complex I to IV) in ETS, they are coupled to ATP synthase (complex V) and thus ATP are synthesized.
Molecule oxidized in ETS Number of ATP produced
1 molecule of NADH 3 ATP
1 molecule of FADH 2 2 ATP
Role of $O_{2}$ : The role of oxygen is limited to the terminal stage of the aerobic process but is vital - it acts as
the final hydrogen acceptor and it drives the whole process by removing H+ from the system.