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The Calvin cycle is a complex process in photosynthetic organisms that uses stored energy to turn carbon dioxide into usable compounds, also known as carbon fixation. It occurs in the stroma of chloroplasts and requires sunlight to activate enzymes. The cycle is essential for the survival of the organism and has a significant impact on the world’s climate by removing carbon dioxide from the air.
The Calvin cycle is a process in which stored energy is used to create usable compounds in a photosynthetic organism. This chemical reaction is sometimes known as the Calvin-Bensom-Bassham cycle, after Melvin Calvin, James Bassham and Andrew Benson, the University of California researchers who first described the process. The chemistry behind this cycle is extremely complex, but the basics can be understood by laymen.
Photosynthetic organisms use sunlight to create energy which is stored in the form of various chemical compounds. For the organism, this is only the first step, as energy does nothing for the organism once it has been stored. In the Calvin cycle, energy is used to turn carbon dioxide into a sugar that can be used by the plant, in a process sometimes referred to as carbon fixation.
This process occurs within the stroma, a network of connective tissue in the body’s chloroplasts. Chloroplasts are specialized organelles found in the cells of photosynthetic organisms. For the Calvin cycle to occur, certain enzymes must be activated through exposure to sunlight. These enzymes bind to the carbon in carbon dioxide, setting off a chain reaction that leads to the creation of a sugar.
Some people refer to the Calvin cycle as a dark reaction or a light-independent reaction, referring to the fact that it can take place regardless of the presence of sunlight. However, sunlight still plays a critical role, because the enzymes responsible for the Calvin cycle will not be active unless they have been stimulated by sunlight. While this cycle can occur in the middle of the night, the body still needs regular sun exposure to store energy and activate enzymes so that the Calvin cycle continues.
For the body, the Calvin process is essential, because it supplies the compounds necessary for the survival of the organism. Calvin’s Process is of interest to humans both out of general curiosity about how the world works and because it explains how plants use carbon. Plants are famous for absorbing carbon dioxide and releasing oxygen, a characteristic that has a huge impact on the world’s climate. Carbon fixation can help remove carbon dioxide from the air by creating a usable oxygen supply, and some research has suggested that the Earth’s atmosphere was formed through this process, as a result of an explosion of photosynthetic organisms that created enough oxygen for other forms of life to appear.
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