An early step in the process of carbon fixation combines three molecules of CO₂ with three molecules of RuBP to produce three 6-carbon molecules,which are immediately converted to six 3-carbon molecules.These six molecules are phosphorylated and reduced to produce glyceraldehyde 3-phosphate (G3P).What additional events occur to complete the Calvin cycle? A)release of two G3P to make sugars and regeneration of ATP from ADP B)release of one G3P to make sugars and regeneration of RuBP C)release of one G3P to make sugars and regeneration of NADPH from NADP⁺ D)release of one G3P to make sugars and regeneration of citrate

Question

Quizplus · Accepted Answer

The remaining five G3P molecules regenerate three molecules of RuBP, using ATP generated from the light-dependent reactions. The RuBP is then ready to react with more CO₂ in the next round of carbon fixation. One G3P molecule is used to make a sugar molecule, such as glucose or fructose.

An Early Step in the Process of Carbon Fixation Combines