Answer :
The correct order of molecular conversions for the Calvin cycle is RuBP + CO2 → [RuBisCO] 3-PGA → G3P.
The Calvin cycle is a group of chemical reactions that happen in the chloroplasts of plant cells. The energy from light captured during the light reactions of photosynthesis is used by the Calvin cycle to produce glucose and other carbohydrates from carbon dioxide and water.
The Calvin cycle involves three phases: carbon fixation, reduction, and regeneration of RuBP (ribulose-1,5-bisphosphate).In the first stage, carbon dioxide is fixed into organic compounds using the enzyme RuBisCO (ribulose bisphosphate carboxylase/oxygenase) and is converted into 3-PGA (3-phosphoglycerate). The second stage involves the reduction of 3-PGA to G3P (glyceraldehyde-3-phosphate) through the addition of energy and electrons from NADPH (nicotinamide adenine dinucleotide phosphate) and ATP (adenosine triphosphate) produced during the light reactions.
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