Calvin cycle

n. A series of chemical reactions that occur as part of photosynthesis, in which carbon is broken away from gaseous carbon dioxide and fixed as organic carbon in compounds that are ultimately converted into sugars.

[After Melvin Calvin.]

Calvin cycle

n (Botany) botany a series of reactions, occurring during photosynthesis, in which glucose is synthesized from carbon dioxide [C20: named after Melvin Calvin, who elucidated it]

Calvin cycle

Fig. 86 Calvin cycle . The ‘dark’ reactions of the Calvin cycle.

Calvin cycle

a series of chemical reactions, first described by Melvin CALVIN, which take place in the watery matrix of CHLOROPLASTS, where carbon dioxide is incorporated into more complex molecules and eventually carbohydrate. Energy for the reactions is supplied by ATP with NADPH (see NADP acting as a reducing agent, both having been produced in the light reactions of PHOTOSYNTHESIS. Since light is not required for the Calvin cycle to continue (provided CO₂ ,ATP and NADPH are present) the steps are called the ‘dark’ reactions.

Every turn of the cycle fixes one molecule of carbon dioxide by producing two molecules of PGA and then two molecules of PGAL; three turns are necessary to release one molecule of PGAL (C₃) for the glucose pathway with the remaining five PGAL molecules remaining within the cycle. Thus six turns produce sufficient quantities of PGAL for the production of one molecule of glucose (C3 + C3 = C6).

单词	calvin cycle
释义	Calvin cycle Calvin cycle n. A series of chemical reactions that occur as part of photosynthesis, in which carbon is broken away from gaseous carbon dioxide and fixed as organic carbon in compounds that are ultimately converted into sugars. [After Melvin Calvin.] Calvin cycle n (Botany) botany a series of reactions, occurring during photosynthesis, in which glucose is synthesized from carbon dioxide [C20: named after Melvin Calvin, who elucidated it] Calvin cycle Calvin cycle [′kal·vən ‚sī·kəl] (cell and molecular biology) A metabolic process during photosynthesis that uses light indirectly to convert carbon dioxide to sugar in the stroma of chloroplasts. Also known as Calvin-Benson cycle; carbon fixation cycle. Calvin cycle Fig. 86 Calvin cycle . The ‘dark’ reactions of the Calvin cycle. Calvin cycle a series of chemical reactions, first described by Melvin CALVIN, which take place in the watery matrix of CHLOROPLASTS, where carbon dioxide is incorporated into more complex molecules and eventually carbohydrate. Energy for the reactions is supplied by ATP with NADPH (see NADP acting as a reducing agent, both having been produced in the light reactions of PHOTOSYNTHESIS. Since light is not required for the Calvin cycle to continue (provided CO₂ ,ATP and NADPH are present) the steps are called the ‘dark’ reactions. Every turn of the cycle fixes one molecule of carbon dioxide by producing two molecules of PGA and then two molecules of PGAL; three turns are necessary to release one molecule of PGAL (C₃) for the glucose pathway with the remaining five PGAL molecules remaining within the cycle. Thus six turns produce sufficient quantities of PGAL for the production of one molecule of glucose (C3 + C3 = C6).
随便看	certificate practice statement certificate practice statements certificate program in financial planning certificate program in management certificate program in medical management certificate program in real estate development certificate program in survey methodology certificate renewal examination, written certificate reply certificate request form certificate request message dvap d-var dvar dvaravati d variabilis d variant of encephalomyocarditis virus d variometer dvarionas, balis dominiko dvarp dvars dvas dvase dvasinès pagalbos jaunimui centras dv asv