So if I were to pitch bread yeast, and get to primary fermentation, which as I understand it, is the point at which regular cellular respiration can no longer continue due to a lack of oxygen , which is needed for the electron transport chain. Therefore the yeast switch to fermentation, which produces my desired product, ethanol.
But as I understand it, at this state the yeast are no longer reproducing and are in a survival mode.
Therefore if I were to cut a 2$L$ bottle of my primary ferment in half, and then add more sugar and water to the now separate 1$L$ bottles, and oxygen (if possible), up to 2$L$, would I be able to have the same amount of ethanol produced/would fermentation even occur?
I feel there would be diminishing returns even if it was possible, since yeast can only reproduce asexually so many times, which happens during stressful times, which this process might induce?