When an organism is exposed to a limited quantity of oxygen, the cell's mitochondria will stop cellular respiration involving the Krebs cycle and enter the process of fermentation to survive, it means <span>Fermentation must create a net gain of ATP.</span>
What diagram ? I don't see one
If it is Not 3-4 Then it should be 2-1!
Theories explain phenomena, whilst laws are generalizations which characterize them.