It can continue to operate in the absence of oxygen. Carbons enter the cycle only from acetyl CoA . It is inhibited by calcium. High concentrations of NADH will inhibit one or more reactions. High concentrations of succinyl CoA stimulate the first reaction in the cycle.
Calcium inhibits several reactions in the cycle.
High concentrations of ADP will inhibit one or more reactions. Two answers are correct. What simple fact explains why neither of the two carbons in the acetyl group of acetyl CoA is liberated as CO 2 in the turn of the cycle in which the acetyl CoA entered. Succinic dehydrogenase is a site of regulation. Compounds do not leave the cycle once they enter.