Overview and steps of the citric acid cycle , also known as the Krebs cycle or tricarboxylic acid (TCA) cycle . Glycolysis , where the simple sugar glucose is broken down, occurs in the cytosol. Pyruvate, the product from glycolysis , is transformed into acetyl CoA in the mitochondria for the next step. Glycolysis is the first step in the breakdown of glucose to extract energy for cellular metabolism. Glycolysis consists of an energy-requiring phase followed by an energy-releasing phase. Let's explore the process of glycolysis , the first phase of cellular respiration. Learn how this process breaks down glucose into two 3-carbon compounds, using two ATPs in the investment phase and generating a net of two ATPs in the payoff phase.
