High School

Which compound is produced during carbon fixation?

A. PGA
B. G3P
C. RuBP
D. C6H12O6

Answer :

Final answer:

The compound produced during carbon fixation is 3-Phosphoglycerate (3-PGA). This occurs when carbon dioxide reacts with RuBP, facilitated by RuBisCO. 3-PGA is a crucial intermediate in forming glucose and other organic molecules in the Calvin cycle.


Explanation:

Carbon Fixation in the Calvin Cycle

During the process of carbon fixation, the specific compound produced is 3-Phosphoglycerate (3-PGA). This occurs when carbon dioxide (CO₂) reacts with ribulose bisphosphate (RuBP) in a reaction catalyzed by the enzyme RuBisCO. For each molecule of CO₂ fixed, two molecules of 3-PGA are formed.

This step is crucial as it converts an inorganic carbon source into an organic form that can be utilized by the plant. The PGA molecules can then be further processed to eventually produce other compounds, such as glyceraldehyde-3-phosphate (G3P) and, ultimately, glucose, through subsequent reactions in the Calvin cycle.

Importance of 3-PGA

3-PGA represents a key intermediate in the Calvin cycle and serves as the starting point for synthesizing sugars and other organic compounds vital for the plant's metabolism.


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