Cellular respiration produces a net total of 38 ATP (adenosine triphosphate) molecules per glucose molecule.

Here's the breakdown:

* Glycolysis: 2 ATP are produced, but 2 are also used, resulting in a net gain of 0 ATP.

* Krebs Cycle: 2 ATP are produced.

* Electron Transport Chain: 34 ATP are produced.

Therefore, the total net gain is 38 ATP.

It's important to note that this is a theoretical maximum. In reality, the number of ATP molecules produced can vary slightly depending on factors such as the efficiency of the electron transport chain and the type of cell.