follow Dictionary.com

11 Trending Words of 2014

Calvin cycle

noun
1.
(botany) a series of reactions, occurring during photosynthesis, in which glucose is synthesized from carbon dioxide
Word Origin
C20: named after Melvin Calvin, who elucidated it
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
Cite This Source
Contemporary definitions for calvin cycle
noun

a cycle of biochemical reactions taking place in the chloroplasts plants during photosynthesis in which carbon dioxide is fixed and six-carbon sugar formed; also called Calvin-Benson cycle

Word Origin

named for Melvin Calvin, Nobel prize-winning chemist

Dictionary.com's 21st Century Lexicon
Copyright © 2003-2014 Dictionary.com, LLC
Cite This Source
calvin cycle in Science
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 © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Word Value for calvin

0
0
Scrabble Words With Friends