HORTICULTURE

Detailed explanation-1: -During the first phase of the Calvin cycle, carbon fixation occurs. The carbon dioxide is combined with ribulose 1, 5-bisphosphate to form two 3-phosphoglycerate molecules (3-PG). The enzyme that catalyzes this specific reaction is ribulose bisphosphate carboxylase (RuBisCO).

Detailed explanation-2: -Figure: The Calvin Cycle: The Calvin cycle has three stages. In stage 1, the enzyme RuBisCO incorporates carbon dioxide into an organic molecule, 3-PGA.

Detailed explanation-3: -Diagram of the Calvin cycle, illustrating how the fixation of three carbon dioxide molecules allows one net G3P molecule to be produced (that is, allows one G3P molecule to leave the cycle).

Detailed explanation-4: -Since each CO 2 molecule produces two G3P molecules, three CO 2 molecules produce six G3P molecules, of which five are used to regenerate RuBP, leaving a net gain of one G3P molecule per three CO 2 molecules (as would be expected from the number of carbon atoms involved).

Detailed explanation-5: -Ap Biology : Example Question #2 Every 3 cycles of the Calvin Cycle (light independent reaction), 6 molecules of G3P are produced; only 1 is used to produce glucose. The remaining 5 molecules of G3P are used to regenerate RuBP to allow the Calvin Cycle to continue.