Katabolismus

Katabolismus, also known as catabolism, is the set of metabolic pathways that breaks down molecules into smaller units that can be oxidized to release energy in the form of ATP. It is one of the two main branches of metabolism, the other being anabolism. Catabolic processes are essential for providing the energy and building blocks required for anabolic processes.

During catabolism, complex organic molecules such as carbohydrates, fats, and proteins are broken down. For example, carbohydrates are broken down into monosaccharides like glucose, which can then be further processed. Fats are broken down into fatty acids and glycerol, and proteins are broken down into amino acids. These smaller molecules are then typically fed into pathways like cellular respiration, where they are oxidized through a series of reactions.

The primary goal of catabolism is energy production. The energy released from the breakdown of these molecules is captured and stored in the form of adenosine triphosphate (ATP), which serves as the main energy currency of the cell. Key catabolic pathways include glycolysis, the Krebs cycle (also known as the citric acid cycle), and oxidative phosphorylation. Additionally, catabolism generates intermediate molecules that can be used as precursors for anabolic synthesis. This interplay between catabolism and anabolism is known as metabolism.