Answer:
The total number of ATP molecules produced for every glucose molecule that undergoes cellular respiration varies depending on the specific type of cellular respiration and the organism performing it.
In aerobic cellular respiration, which occurs in the presence of oxygen, the net number of ATP molecules produced by the complete oxidation of one glucose molecule is about 30-32 ATP molecules. This includes the 2 ATP molecules produced during glycolysis, 2 ATP molecules produced during the Krebs cycle, and the majority of ATP molecules produced during oxidative phosphorylation, which generates the bulk of ATP via the electron transport chain and chemiosmosis.
In anaerobic cellular respiration, which occurs in the absence of oxygen, the net number of ATP molecules produced is much lower, typically around 2 ATP molecules per glucose molecule. This is because anaerobic respiration only utilizes glycolysis to produce ATP, without the Krebs cycle or oxidative phosphorylation.
It is important to note that the actual number of ATP molecules produced per glucose molecule can vary depending on the specific conditions of the cell or organism, and other factors such as the efficiency of the electron transport chain or the availability of electron carriers.