Final answer:
The reaction between carbon dioxide and RuBP, catalyzed by the enzyme RuBisCO, results in the formation of 3-phospho glyceric acid (3-PGA). Later steps convert 3-PGA into glucose, while also regenerating RuBP for further carbon fixation.
Step-by-step explanation:
When Ribulose-1,5-bisphosphate (RuBP) binds with carbon dioxide, a process called carbon fixation occurs. This reaction is catalyzed by the enzyme RuBisCO. For each carbon dioxide molecule that reacts with one RuBP, two molecules of a compound called 3-phospho glyceric acid (3-PGA) are formed. The number of carbon atoms remains the same as atoms move to form new bonds during the reactions. Latter, ATP and NADPH are used to convert 3-PGA into glyceraldehyde 3-phosphate (G3P), from which glucose is ultimately produced. The remaining G3P serves to regenerate RuBP, enabling further CO₂ fixation. Three additional molecules of ATP are involved in these regeneration reactions.
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