Visit the website www.ecocyc.org and the metabolic pathways for serine synthesis and glycolysis. The starting molecule of the serine synthesis pathway is an intermediate in glycolysis. In order to answer this question completely, you may need to consider a few other pathways as well. For example, it is likely that the displayed glycolysis pathway does not actually start with glucose. To get glucose 6-phosphate from glucose requires 1 ATP. One of the steps in the serine synthesis pathway is coupled to a conversion of l-glutamate to 2- ketoglutarate. You will have to look up the “glutamate biosynthesis III" pathway to determine the cost of regenerating l-glutamate from 2-ketoglutarate.