Cellular Respiration

1. Glycolysis

1.1. First set of reactions in cellular respiration

1.2. End result is two molecules of a three-carbon molecule called pyruvic acid.

1.3. During the process, one molecule of glucose is transformed into two molecules of pyruvic acid.

2. Krebs Cycle

2.1. Pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions.

2.2. Also known as citric acid cycle.

3. Electron Transport Chain

3.1. Glycolysis generates high-energy electrons that are passed to NAD+, forming NADH. These molecules enter the mitochondrion, where they join the NADH and FADH2 generated by the Krebs Cycle.

3.2. The electron transport chain uses the high-energy electrons from glycolysis and the Krebs Cycle to convert ADP into ATP.