Answer:
The process that does not require oxygen is fermentation.
Explanation:
Fermentation is an alternative route of cellular respiration for obtaining energy, in the absence of oxygen. In aerobic respiration, oxygen is the acceptor of electrons from NADH but, in anaerobic respiration, the electron acceptor is an organic compound.
The fermentation process does not occur in the mitochondria nor does it involve the electron transport chain, and has a low energy yield at the end of the process.
With respect to the other options:
Fermentation is an alternative route for obtaining energy, in the absence of oxygen. Fermentation is the process that does not require oxygen.
Fermentation:
It is an alternative route for obtaining energy, in the absence of oxygen. In anaerobic respiration, the electron acceptor of NADH is an organic compound.
It has a low energy yield at the end of the process.
The electron transport chain and the Krebs cycle are the processes that occur in the presence of oxygen.
Therefore, Fermentation is the process that does not require oxygen.
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