In the Initial Step in Carbon Fixation, a Molecule of CO₂

question 14

Multiple Choice

In the initial step in carbon fixation, a molecule of CO₂ is attached to RuBP to produce a six-carbon molecule, which is immediately split to produce two molecules of 3-phosphoglycerate. After phosphorylation and reduction produces glyceraldehyde 3-phosphate (G3P) , what more needs to occur to complete the Calvin cycle?

• A) addition of a pair of electrons from NADPH
• B) regeneration of ATP from ADP
• C) regeneration of RuBP
• D) regeneration of NADP⁺

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