1. The problem statement, all variables and given/known data Explain how a cell can use catabolic reactions to drive anabolic reactions, despite energy loss in the form of entropy and heat. 2. Relevant equations Catabolic Pathway: A series of reactions that results in the breakdown of larger,more-complex molcules into small, less complex molecules releasing energy in the process Anabolic Pathway: Opposite of Catabolic Pathway Change in Free Eneryg=ΔG=ΔH-TΔS where H is the enthalpy and S is the entropy. 3. The attempt at a solution Since catabolic reactions release energy, this new energy can be used in anabolic reactions. The main question,however, is how do I know this is chemical energy that can be used? How do I not know this is energy is not lost due to heat? I believe this reason has to do with the fact there is negative ΔG for catabolic reactions meaning there is less free energy in the products, but I don't entirely understand how this shows there is potential energy to spare.