The document discusses several biochemical pathways involved in energy metabolism in cells. It describes glycolysis, the pentose phosphate pathway, and the Entner-Doudoroff pathway for carbohydrate metabolism. It also discusses fermentation, respiration, the Krebs cycle, and how proteins, lipids, and other molecules are broken down to generate energy. The pathways are integrated through common intermediates to allow both catabolic and anabolic reactions.

1. Biochemical Pathways of Energy Metabolism Series of controlled reactions rather than in a single burst .