A proton gradient is a difference in proton concentration across a membrane, created by the electron transport chain. ATP synthesis occurs when protons flow back across the membrane through ATP synthase, using the energy from this gradient to convert ADP and inorganic phosphate into ATP. This article is on Proton […]
Chemiosmotic coupling is the mechanism by which ATP is synthesized in mitochondria and chloroplasts. It involves the movement of protons across a membrane, creating a proton gradient. The energy from this gradient drives ATP synthase to convert ADP and inorganic phosphate into ATP. This is an MCQ on Chemiosmotic Coupling […]
The Q cycle is a mechanism in the electron transport chain’s complex III (cytochrome bc1 complex) that transfers electrons from ubiquinol (QH2) to cytochrome c. It involves proton pumping from the mitochondrial matrix to the intermembrane space, contributing to the proton gradient for ATP synthesis. This is an MCQ on […]
Reduced coenzymes, such as NADH and FADH2, are molecules that carry electrons and hydrogen ions during cellular respiration. They are formed when NAD+ and FAD gain electrons (are reduced) during metabolic reactions like glycolysis and the Krebs cycle, facilitating ATP production in the electron transport chain. This is an MCQ […]
The link reaction, or pyruvate decarboxylation, is the process where pyruvate from glycolysis is converted into acetyl-CoA in the mitochondria. Pyruvate loses a carbon dioxide molecule, and NAD+ is reduced to NADH. This reaction connects glycolysis to the Krebs cycle. This is an MCQ on Link Reaction of Respiration or […]