Can you state what you know so far about the relationship between NADH/NAD+ and ATP?
I remember from my high school biology that NADH is an electron carrier that carries the electrons to the transport chain at the very end. On the other hand, ATP turning into ADP should be releasing energy that is used to go against a gradient. I don't remember exactly but I think there is a pump in the membrane related to ATP that uses it to pump H+
Can you state what you know so far about the relationship between NADH/NAD+ and ATP?
NAD+ becomes reduced, accepting electrons to become NADH. It then transports these electrons to the electron transport chain that changes ADP to ATP.
The phosphorylation (or condensation of phosphate groups onto AMP) is an endergonic process. By contrast, the hydrolysis of one or two phosphate groups from ATP, a process called dephosphorylation, is exergonic.
So phosphorylation removes H2O while adding a phosphate group and dephosphorylation requires H2O to remove a phosphate group.