Anaerobic glycolysis - wikipedia Anaerobic glycolysis This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( December 2009 ) Anaerobic glycolysis is the transformation of glucose to lactate when limited amounts of oxygen ( O ) are available. Anaerobic glycolysis is only an effective means of energy production during short, intense exercise, providing energy for a period ranging from 10 seconds to 2 minutes. The anaerobic glycolysis ( lactic acid ) system is dominant from about 10 -- 30 seconds during a maximal effort. It replenishes very quickly over this period and produces 2 ATP molecules per glucose molecule or about 5 % of glucose 's energy potential ( 38 ATP molecules ). The speed at which ATP is produced is about 100 times that of oxidative phosphorylation. Anaerobic glycolysis is thought to have been the primary means of energy production in earlier organisms before oxygen was at high concentration in the atmosphere and thus would represent a more ancient form of energy production in cells. In mammals, lactate can be transformed by the liver back into glucose ; see Cori cycle. Fates of pyruvate under anaerobic conditions : Pyruvate is the terminal electron acceptor in lactic acid fermentation When sufficient oxygen is not present in the muscle cells for further oxidation of pyruvate and NADH produced in glycolysis, NAD+ is regenerated from NADH by reduction of pyruvate to lactate. Pyruvate is converted to lactate by the enzyme lactate dehydrogenase. The standard free energy change of the reaction is - 25.1 kJ / mol. Ethanol fermentation Yeast and other anaerobic microorganisms convert glucose to ethanol and CO2 rather than pyruvate. Pyruvate is first converted to acetaldehyde by enzyme pyruvate decarboxylase in the presence of Thiamine pyrophosphate and Mg++. Carbon - dioxide is released during this reaction. Acetaldehyde is then converted to ethanol by the enzyme alcohol dehydrogenase. NADH is oxidized to NAD+ during this reaction. See also Lactate shuttle hypothesis Aerobic glycolysis References Jump up ^ Cox Michael M, Nelson David L ( 2008 ). `` Chapter 14 : Glycolysis, Gluconeogenesis, and the Pentose Phosphate Pathway ''. Lehninger Principles of Biochemistry ( 5 ed. ). WH Freeman & Co. pp. 527 -- 568. ISBN 978 - 1429222631. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Anaerobic_glycolysis&oldid=806540075 '' Categories : Chemical reactions Hidden categories : Articles lacking sources from December 2009 All articles lacking sources Talk About Wikipedia Eesti Português Edit links This page was last edited on 22 October 2017, at 18 : 01. About Wikipedia

Question: lactic acid production would be the fate of which energy system
Answer: Anaerobic glycolysis