The electron transport chain stops, stopping the citric acid cycle
Explanation:
Aerobic organisms are those that need the environment in which they live to have the presence of oxygen in order for them to obtain energy. These organisms perform aerobic cellular respiration and are mostly eukaryotic and multicellular sevens.
As previously said, these beings perform aerobic cellular respiration and not fermentation (occurs without the presence of oxygen), if for some reason, an aerobic organism is placed in an oxygen-free environment, cellular respiration will be compromised, because electron transport chain will stop, interrupting the citric acid cycle
