Answer :
Final answer:
The Calvin Cycle is a self-sustaining process wherein most G3P molecules generated are recycled back into the cycle. This recycling forms the compound RuBP, which prepares the system for more carbon dioxide fixation. This continuous cycle captures and changes solar energy into a usable form for the plant.
Explanation:
The Calvin Cycle, central to photosynthesis in plants, involves the creation of a carbohydrate molecule through a repeating process. During this iterative process, a molecule called Glyceraldehyde-3-Phosphate (G3P) plays a crucial role. It's formed when energy captured through photosynthesis from ATP and NADPH is used.
However, not all of the formed G3P exits the cycle. Instead, most of the G3P molecules are recycled to regenerate a compound called ribulose-1,5-Bisphosphate (RuBP). This recycling step ensures the Calvin Cycle's sustainability, making it ready for more carbon dioxide fixation. So while it takes three turns of the cycle to get sufficient net carbon to export one G3P and build one part of a carbohydrate molecule, the remaining five molecules of G3P keep going through the cycle to regenerate RuBP.
This regeneration step involves the use of additional ATP, demonstrating how the Calvin Cycle operates in a continuous mode to effectively capture and convert solar energy into a form usable by the plant
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