Answer :
The G3P produced in the Calvin cycle is used primarily for the production of glucose and for the regeneration of RuBP, which allows the Calvin cycle to continue.
The G3P (Glyceraldehyde-3-phosphate) produced at the end of the second phase of the Calvin cycle is directly used for the production of glucose. During the Calvin cycle, the G3P serves two main functions: it is used in the regeneration of RuBP (ribulose 1,5-bisphosphate), which allows the cycle to continue, and it is also used in gluconeogenesis, the process which leads to the production of glucose and other carbohydrates such as starch and sucrose. Specifically, five out of six molecules of G3P are used to regenerate three molecules of RuBP, while the remaining G3P molecule can enter pathways to synthesize glucose and other carbohydrates.