Is it safe to assume that catabolic reactions are always exergonic and anabolic reactions are always endergonic? Also, I had a question on energy metabolism. Since the mitochondria is where energy is stored, does that mean that metabolic (energy) pathways only occur in the mitochondria? Or is there some other place in the cell that it can be done? I had this question: Metabolic pathways ________________. are often organized as a multi-step sequence of reactions None of these. occur only in mitochondria only link smaller molecules together to create polymers always break down large molecules into smaller ones Would it be only occur in mitochondria? Thanks!