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Krebs cycle

noun, Biochemistry
1.
a cycle of enzyme-catalyzed reactions in living cells that is the final series of reactions of aerobic metabolism of carbohydrates, proteins, and fatty acids, and by which carbon dioxide is produced, oxygen is reduced, and ATP is formed.
Origin
1940-1945
1940-45; after H.A. Krebs
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for krebs-cycle

Krebs cycle

noun
1.
a stage of tissue respiration: a series of biochemical reactions occurring in mitochondria in the presence of oxygen by which acetate, derived from the breakdown of foodstuffs, is converted to carbon dioxide and water, with the release of energy Also called citric acid cycle, tricarboxylic acid cycle
Word Origin
C20: named after Hans Adolf Krebs (1900–81), German-born British biochemist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for krebs-cycle

Krebs cycle

1941, named for Sir Hans Adolf Krebs (1900-1981), German-born British biochemist.

Online Etymology Dictionary, © 2010 Douglas Harper
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krebs-cycle in Medicine

Krebs cycle (krěbz)
n.
A series of enzymatic reactions in aerobic organisms involving oxidative metabolism of acetyl units and producing high-energy phosphate compounds, which serve as the main source of cellular energy. Also called citric acid cycle, tricarboxylic acid cycle.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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krebs-cycle in Science
Krebs cycle  
A series of chemical reactions that occur in most aerobic organisms and are part of the process of aerobic cell metabolism, by which glucose and other molecules are broken down in the presence of oxygen into carbon dioxide and water to release chemical energy in the form of ATP. The Krebs cycle is the intermediate stage, occurring between glycolysis and phosphorylation, and results in the enzymatic breaking down, rearranging, and recombination of byproducts of glycolysis. The combination of glycolysis and the Krebs cycle ultimately allows 36 ATP molecules to be produced from the energy contained in one molecule of glucose and six molecules of oxygen. Also called citric acid cycle. See more at cellular respiration.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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