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Calvin cycle

Definition

noun

A cyclical series of biochemical reactions that occur in the stroma of chloroplasts during photosynthesis. It includes the light-independent reactions such as carbon fixation, reduction reactions and ribulose 1,5-diphosphate (RuDP) whereby sugars and starch are ultimately produced.


Supplement

At this stage of photosynthesis, the energy released from ATP produced during light reactions is used to drive the conversion of carbon dioxide and other compounds into an organic molecule (e.g. glucose).

In C3 plants, the Calvin cycle is used directly to fix carbon dioxide. In C4 plants and CAM plants, a different carbon fixation precedes Calvin cycle.


Word origin: named after one of the discoverers, Melvin Calvin, a Nobel prize-winning chemist.

Variants: Calvin-Benson cycle or Calvin- Benson-Bassham cycle

See also: Photosynthesis on Tutorials for further information.


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Converting to energy source- glycolysis etc..

... of glycolysis (which occurs in the cytosol of cells) and citric acid cycle + oxidative phosphorylation (which occur in the mitochondria of cells). ... to create ATP and NADPH. this ATP and NADPH will then be used in the Calvin-Bensen cycle to make the sugars While you are learning these molecular ...

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by MrMistery
Tue Aug 25, 2009 8:05 pm
 
Forum: Molecular Biology
Topic: Converting to energy source- glycolysis etc..
Replies: 1
Views: 50

Converting to energy source- glycolysis etc..

... i know so far glycolysis --> pyruvate oxidation --> citric acid cycle --> electron transport chain --> produces a total of 32 ATP So ... the photophosphorylation produces ATP and NADPH which is used in the Calvin cycle to produce carbohydrates...so how come plants produce carbohydrates ...

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by xbri
Sun Aug 23, 2009 10:06 pm
 
Forum: Molecular Biology
Topic: Converting to energy source- glycolysis etc..
Replies: 1
Views: 50

Calvin cycle and chemoautotrophy? Please help!

... respiration. This bacteria is also a chemoautotroph and uses the calvin cycle. What two products from aerobic respiraton can feed into the Calvin cycle to fix CO2? ...

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by thisisme1886
Sun May 10, 2009 4:41 pm
 
Forum: Molecular Biology
Topic: Calvin cycle and chemoautotrophy? Please help!
Replies: 1
Views: 331

Enzyme Question

... in the chloroplast, RUBISCO activase, and then the other enzymes of the calvin cycle: phosphoglycerate kinase, glyceraldehyde 3-phosphate dehydrogenase, triose phosphate ...

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by MrMistery
Mon Apr 20, 2009 2:05 pm
 
Forum: Molecular Biology
Topic: Enzyme Question
Replies: 1
Views: 450

Photosynthesis question

... to the bundle-sheath cells where CO2 is released for entry into the Calvin Cycle? Or have I got this all wrong? Thanks

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by seders99
Sat Apr 04, 2009 11:54 pm
 
Forum: Ecology
Topic: Photosynthesis question
Replies: 6
Views: 766
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