A bacterium is growing on fumarate as a sole source of carbon. a. Assuming that this organism does not encode the gene necessary to synthesize pyruvate carboxylase, outline the reactions that would need to take place in order to produce the starting reactants required to complete one round of the TCA cycle. Include the structures/structure names as well as the names of all enzymes and cofactors required. b. Ignoring structural details, show the names of the reactants, products, enzyme names and cofactors produced through the complete oxidation of the energy source produced in part a above. c. From the reactions shown in part a and b above, what are the total number of ATP equivalents produced?