For every three molecules of CO2 that enter the Calvin cycle, the cycle produces one molecule of glyceraldehyde-3-phosphate (G3P) as a net product. Which statement correctly describes the total G3P produced and its fate?

Core Concept

When 3 CO2 enter the cycle, they combine with 3 RuBP (15 carbons) to form 6 molecules of 3-PGA (18 carbons), which are converted to 6 G3P (18 carbons). Five G3P (15 carbons) are rearranged to regenerate 3 RuBP, and one G3P (3 carbons) is the net product available for biosynthesis.