The following half reactions play important roles in metabolism.
1/2 O2 1 2H+ + 2e– → H2O
NADH + H+ → NAD+ + 2H+ + 2e-
Which of these two is a half reaction of oxidation? Which one is a half reaction of reduction? Write the equation for the overall re-action. Which reagent is the oxidizing agent (electron acceptor)? Which reagent is the reducing agent (electron donor)?