In this article we will discuss about the oxidative decarboxylation of pyruvic acid. We know that anaerobiosis the pyruvic acid formed during glycolysis reacts with NADH which accumulates to give lactic acid (or ethanol) and thus permits the regeneration of NAD+. But when oxygen is available, NADH is reoxidized thanks to the electrons carrier system, and the pyruvic acid is [...]
In this article we will discuss about the functions of the Krebs cycle, explained with the help of diagrams. Krebs made an outstanding contribution to the discovery of the operating mechanisms of this cycle which is also called tricarboxylic cycle or citric cycle, owing to the participation of various tricarboxylic acids, including citric acid. Before studying this cycle — which [...]
The following points highlight the three important notions of thermodynamics. The notions are: 1. Free Energy Change 2. Application to Chemical Reactions 3. Application to Reactions in Living Organisms. Notion # 1. Free Energy Change: If we consider a system consisting of two compounds A and B which react to give C: A + B → C By reacting, the [...]