NAD is a coenzyme.
Its role is as a hydrogen acceptor when it is involved in the oxidation of glucose (cell respiration). Is is written as NAD+, and after accepting hydrogen it becomes the reduced form, NADH.
NADH in turn acts as a hydrogen donor when it becomes oxidized to reform NAD+.
O2 ADDED: Not O2, but one atom of oxygen.
The final acceptor of hydrogen in cellular respiration is oxygen. Oxygen combines with hydrogen to form water in the electron transport chain of the respiration process.
In aerobic respiration, the final electron acceptor is (usually) oxygen. Sometimes it can be sulfur or nitrogen in the absence of oxygen (as in extreme environments) in extremophiles.
Oxygen, because it is highly electronegative.
oxygen
Aerobic respiration requires oxygen to operate (whereas anaerobic respiration does not), and oxygen is the electron acceptor.
O2 ADDED: Not O2, but one atom of oxygen.
In aerobic respiration it is oxygen.
The final acceptor of hydrogen in cellular respiration is oxygen. Oxygen combines with hydrogen to form water in the electron transport chain of the respiration process.
oxygen
Oxygen is required to live without it we die
Because oxygen is the last electron acceptor
Oxygen is considered the ultimate electron acceptor in aerobic respiration. It accepts electrons at the end of the electron transport chain, forming water as a byproduct.
oxygen
It is the last electron acceptor
In aerobic respiration, the final electron acceptor is (usually) oxygen. Sometimes it can be sulfur or nitrogen in the absence of oxygen (as in extreme environments) in extremophiles.
Oxygen, because it is highly electronegative.