explain the krebs cycle with reaction
Answers
The Krebs cycle is simply another name for the Citric Acid Cycle, so named for the researcher who identified the complete cycle in 1937.
This cycle describes a series of chemical reactions that take place in all aerobic organisms (aerobic meaning that they use oxygen to facilitate their metabolism, like we do). The cycle is pretty complicated, there are many steps, many reactants and many product, and the cycle can be modified or affected by a variety of factors. However the essential function is to create ATP, the "energy molecule" from the carbon sources that the organism ingests.
Glucose is typically given as the starting molecule, which we ingest by eating, and plants ingest via photosynthesis. The glucose is broken down by glycolysis and decarboxylation to become acetyl-CoA; these steps are not part of the Krebs process. The Krebs process then performs a number of reactions which produce ATP, NADH, ubiquinol and carbon dioxide, although not all at once. The carbon dioxide is excreted, the ATP is used throughout the body for energy, and the NADH and ubiquinol are reused or reacted in other metabolic processes to produce different compounds.
Your reactions is ready in the image below.
Explanation:
The Krebs cycle is also called tricarboxylic acid (TCA) cycle or the citric acid cycle. It takes place in the matrix of the mitochondria.
The cycle starts with the reaction between acetyl-CoA and the four-carbon oxaloacetate to form six-carbon citric acid. Through the next steps of the cycle, two of the six carbons of the citric acid removed as carbon dioxide (CO2) to yield the four-carbon compound, oxaloacetate, which is used again in the first step of the next cycle. During the eight reactions that take place, for every molecule of acetyl-CoA the cycle produces three NADH and one flavin adenine dinucleotide (FAD/FADH2), along with one molecule of ATP.
The net equation of the Krebs cycle:
Acetyl CoA + 3 NAD + FAD + ADP + HPO4-2 ——> 2 CO2 + CoA + 3NADH+ + FADH+ + ATP
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