<prompt> Amphibolic cycle isCitric acid cycleGlycolysisProtein synthesisLipolysis  <response>: All other pathways such as beta-oxidation of fat or glycogen synthesis are either catabolic or anabolic. But TCA cycle is truly amphibolic both catabolic and anabolic in nature. There is a continuous influx pouring into Fig.18.9 and a continuous efflux removal of 4-carbon units from the TCA cycle Fig.18.8. In a traffic circle, many roads converge and traffic flows towards one direction. Since various compounds enter into or leave from TCA cycle, it is sometimes called as metabolic traffic circle. Impoant anabolic reactions related with citric acid cycle are a. Oxaloacetate is the precursor of aspaate b. Alpha-ketoglutarate can be made into glutamate c. Succinyl CoA is used for synthesis of heme d. Mitochondrial citrate is transpoed to cytoplasm, where it is cleaved into acetyl CoA, which then is the staing point of fatty acid synthesis 