Overview of Carbohydrate Metabolism for MBBS
A concise overview of carbohydrate metabolism for MBBS students, including glycolysis, Krebs cycle, and oxidative phosphorylation in a simple, exam-oriented manner.
`Carbohydrate metabolism provides energy to almost every cell of the body. The central pathway is glycolysis, which breaks down glucose into pyruvate and produces a small amount of ATP and NADH.
Under aerobic conditions, pyruvate enters the mitochondria and is converted to acetyl-CoA, which then enters the Krebs cycle. The Krebs cycle generates NADH and FADH2, which carry high-energy electrons.
These electrons are used in oxidative phosphorylation, where the electron transport chain and ATP synthase produce most of the ATP in the cell. Oxygen acts as the final electron acceptor.
For exam purposes, focus on: key steps of glycolysis, regulatory enzymes, the link reaction, important products of the Krebs cycle, and the role of the electron transport chain.
Drawing simplified flowcharts and revising them regularly helps you recall pathways quickly during viva and theory exams.`