Glycolysis is very complicated process involving many steps. Glycolysis requires ATP but results in the end with a net gain of two ATP molecule for every glucose molecule that is broken down. All the reactions in glycolysis involve an enzyme. The Greek word lysis means the act of loosening or dissolution.
Glycolysis refers to the breakdown of glucose.
Glycolysis occurs in the cytoplasm of all cells. The glucose molecule C6H12O6 is broken down into two pyruvate molecules C3H3O3.