In the first series of reactions for the krebs cycle, what are the products from the original two pyruvate molecules? what is the first outcome of the krebs cycle? what is created (what are the products) during the second outcome of the krebs cycle? what are the three products of the third phase of the krebs cycle? what happens at the very end of the krebs cycle (the final outcome)? part iv: the electron transport chain nadh and fadh2 enter the electron transport chain after being created during the krebs cycle. what is their role in the electron transport chain, and what happens after they fulfill their role? what does the electron transport chain create? what is required for the electron transport chain to operate? what will happen if oxygen is no longer available? where does the electron transport chain occur? what drives the protons (h+ ions) across the mitochondrial membrane to form atp?