The citric acid cycle (cac) is activated in the presence of oxygen, but what is the link between the cac and oxygen? pick the one best choice:
a.oxygen is an allosteric activator for citrate synthase.
b. the presence of o2 in the mitochondrial matrix releases co2 into the cytosol.
c.the one substrate-level phosphorylation in the cac can occur in the absence of oxygen.
d. the major product of the cac is nadh, the principle electron donor to the o2 , the last electron acceptor in the electron-transport system.
e. the major product of the cac is fadh2 , the principle electron donor to the o2 , the last electron acceptor in the electron-transport system.