Which of the following statements is not true with regards to the Calvin Cycle?

a. Ribulose bisphosphate is regenerated by the end of one cycle.
b. Carbon fixation occurs when carbon dioxide is added into the ribulose bisphosphate molecule.
c. The reduction phase of the Calvin Cycle culminates with the production of glucose or sucrose.
d. NADPH and ATP produced by the light reactions are only used during the reduction and regeneration
phases of the Calvin Cycle.