Why does it take three turns of the calvin cycle to produce g3p, the initial product of photosynthesis?

G3P has 3 carbon atoms, and each turn takes in 1 carbon in the form of CO₂.

Explanation:

The Calvin Benson cycle or Calvin cycle is the series of chemical reactions that occur in chloroplasts during the light-independent reaction in photosynthesis.

Calvin cycle is the process in which a five-carbon molecule RuBP that catches one carbon in each turn and then divide in equal 3 carbon molecule that is G3P.

Thus, the correct answer is - G3P has 3 carbon atoms, and each turn takes in 1 carbon in the form of CO₂.