The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of:

Step-by-step solution

Glycolysis, Krebs cycle and electron transport system, they all give ATP which is the main energy currency of our body. Glycolysis takes place in cytoplasm, Krebs cycle occurs in mitochondrial matrix and ETS takes place in the inner membrane of mitochondria. (Ref. to Fig. 25.6)