Answer :
Final answer:
The majority of the G3P produced in the Calvin Cycle is used to regenerate RuBP, which allows the cycle to continue.
Explanation:
The majority of the G3P (Glyceraldehyde-3-phosphate) produced during the reduction and carbohydrate production phase of the Calvin Cycle is primarily used to regenerate ribulose bisphosphate (RuBP) to continue the cycle. The Calvin cycle is divided into three stages. In stage 1, the enzyme RuBisCO incorporates carbon dioxide into an organic molecule, 3-PGA. In stage 2, the 3-PGA molecule is reduced using electrons supplied by NADPH to form G3P. Finally, in stage 3, the majority of the G3P is used to regenerate RuBP, which is essential for the cycle to continue. Therefore, the correct option would be 'C)RuBP to continue the cycle'.
The Calvin cycle, light-independent reactions, bio synthetic phase, dark reactions, or photosynthetic carbon reduction (PCR) cycle[1] of photosynthesis is a series of chemical reactions that convert carbon dioxide and hydrogen-carrier compounds into glucose.
The Calvin cycle is present in all photosynthetic eukaryotes and also many photosynthetic bacteria. In plants, these reactions occur in the stroma, the fluid-filled region of a chloroplast outside the thylakoid membranes.
These reactions take the products (ATP and NADPH) of light-dependent reactions and perform further chemical processes on them. The Calvin cycle uses the chemical energy of ATP and reducing power of NADPH from the light dependent reactions to produce sugars for the plant to use.
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