英语词汇“calvin cycle”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

Scientific definitions for Calvin cycle

Calvin cycle

A series of chemical reactions that occurs as part of the dark reactions of photosynthesis, in which carbon is broken away from gaseous carbon dioxide and fixed as organic carbon in compounds that are ultimately used to make sugars and starch as food. The Calvin cycle starts with a five-carbon sugar molecule, to which the carbon of carbon dioxide is attached by a covalent bond. This unstable molecule breaks apart into two three-carbon molecules, which are reduced by the electron-carriers ATP and NADPH (which were created by the earlier light reactions) into three-carbon molecules that are available for the synthesis of sugar and starch. It takes three carbon dioxide molecules to produce enough carbon for the synthesis of one of these three-carbon molecules and to regenerate the five-carbon sugar so the cycle can begin again. See more at photosynthesis.

单词	calvin cycle
释义	Calvin cycle noun botany a series of reactions, occurring during photosynthesis, in which glucose is synthesized from carbon dioxide Word Origin for Calvin cycle C20: named after Melvin Calvin, who elucidated it Words nearby Calvin cycle calve, Calvé-Perthes disease, Calvert, calves, Calvin, Calvin cycle, Calvinism, Calvin, John, Calvino, calvities, calvous Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for Calvin cycle Calvin cycle A series of chemical reactions that occurs as part of the dark reactions of photosynthesis, in which carbon is broken away from gaseous carbon dioxide and fixed as organic carbon in compounds that are ultimately used to make sugars and starch as food. The Calvin cycle starts with a five-carbon sugar molecule, to which the carbon of carbon dioxide is attached by a covalent bond. This unstable molecule breaks apart into two three-carbon molecules, which are reduced by the electron-carriers ATP and NADPH (which were created by the earlier light reactions) into three-carbon molecules that are available for the synthesis of sugar and starch. It takes three carbon dioxide molecules to produce enough carbon for the synthesis of one of these three-carbon molecules and to regenerate the five-carbon sugar so the cycle can begin again. See more at photosynthesis. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Calvin cycle

noun

Word Origin for Calvin cycle

Words nearby Calvin cycle

Scientific definitions for Calvin cycle