Answer :
Final answer:
The final product of the Calvin cycle is glyceraldehyde-3-phosphate (G3P), not glucose directly. G3P can be used to synthesize glucose and other carbohydrates. The cycle uses ATP and NADPH generated in the light reactions of photosynthesis.
Explanation:
The Final Product of the Calvin Cycle
The Calvin cycle is a fundamental process in photosynthesis that converts inorganic carbon dioxide into organic compounds. Upon completion of the cycle, the main product generated is glyceraldehyde-3-phosphate (G3P). This three-carbon sugar not only serves as a precursor for the biosynthesis of glucose but also plays a vital role in other metabolic pathways.
During the Calvin cycle, the series of reactions utilizes ATP and NADPH produced in the light-dependent reactions of photosynthesis. Specifically, the enzyme-ran reduction of phosphoglycerate (PGA) transforms it into G3P:
PGA + NADPH + ATP → G3P + NADP+ + ADP + iP
This highlights that while glucose is ultimately formed from G3P, the direct product of the cycle itself is G3P, which accumulates and can be converted into glucose after several cycles.
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