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The Path of a Carbon Atom
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The Path of a Carbon Atom
http://www.ces.fau.edu/nasa/module-4/causes/carbon_story.php
http://ibiologyblog.blogspot.com/2013/02/photosynthesis-and-cellular-respiration.html
Cellular Respiration or Fermentation
By: Ashlyn McElwain
Transition Between Photosynthesis and Respiration
Cellular Respiration or Fermentation occurs in all organisms while photosynthesis occurs in plants, algae, and some bacteria. In a stage called glycolysis, a 6 carbon compound called glucose is split into 3 carbon - pyruvate molecules. Then the pyruvate molecules loses a carbon dioxide molecule and becomes a 2- Carbon Molecule that bonds with Coenzyme A and forms Acetyl-CoA. During the Krebs cycle , the Acetyle-CoA goes through reactions with organic compounds that break down and release carbon dioxide.
Light- Independent Reactions
The carbon atom can make a transition between photosynthesis and respiration because the carbon atom is both a reactant and a product. For example, plants take in carbon dioxide for photosynthesis which releases oxygen. Then other organisms use this oxygen for respiration, which releases carbon dioxide.
These reactions can also be called the Calvin cycle. This cycle of reactions uses six molecules of carbon dioxide to produce a single six-carbon glucose molecule. The carbon dioxide molecules only enter this cycle one at a time. ATP and NADPH, produced during the light-dependent reactions, provide the energy needed for the light-independent reactions to occur.
Light- Dependent Reactions
These reactions occur inside the Thylakoids. Chlorophyll absorbs sunlight and transfers it to high-energy electrons that are carried through proteins called the electron transport chain. NADP+ molecules accept these electrons to form NADPH. NADPH carries the electrons and their energy to the next stage, the light-independent reactions. Oxygen gas is released and ATP molecules are formed. ATP transfers to the light-independent reactions, providing energy for the next stage.
Photosynthesis
http://staff.jccc.net/pdecell/photosyn/photoframe.html
http://en.wikipedia.org/wiki/Photosynthesis
There are 2 stages in which photosynthesis occurs; the Light-Dependent Reactions and the Light- Independent Reactions. These stages convert water, oxygen and carbon dioxide into carbohydrates through light energy. This reaction can be seen as 6 CO2 + 6 H2O + Energy → C6H12O6 + 6 O2