The net production of "fixed" carbon in the Calvin cycle is
A) One molecule of glyceraldehyde-3-phosphate
B) One molecule of glycerate-3-phosphate
C) Two molecules of glycerate-3-phosphate
D) Two molecules of eythrose-4-phosphate
E) One molecule of ribulose-1,5-bisphosphate

Question

Quizplus · Accepted Answer

The Calvin cycle uses carbon dioxide and energy to produce glyceraldehyde-3-phosphate (G3P). For every three CO2 molecules fixed, the cycle produces one net G3P molecule, as two G3Ps are used to regenerate ribulose-1,5-bisphosphate (RuBP), the molecule that CO2 initially reacts with.

The Net Production of "Fixed" Carbon in the Calvin Cycle