Glycolysis is a fundamental metabolic pathway that initiates the breakdown of glucose in the cytosol of cells. This process consists of a series of ten enzymatic steps that convert one molecule of glucose into two molecules of pyruvate. During this transformation, energy is generated in the form of adenosine triphosphate (ATP), and high-energy electrons are captured by electron carriers. Glycolysis is significant because it provides an immediate source of energy regardless of the availability of oxygen, serving as the initial, foundational step that links carbohydrate metabolism to subsequent, more complex energy-producing pathways, including the Krebs cycle.