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(C) The synthesis of hexose sugars (glucose) occurs during the biosynthetic phase (Calvin cycle) of photosynthesis,which takes place in the stroma of

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Enzymes are not available

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(C) The synthesis of hexose sugars (glucose) occurs during the biosynthetic phase (Calvin cycle) of photosynthesis,which takes place in the stroma of the chloroplast.Thylakoids are primarily responsible for the light-dependent reactions (photophosphorylation),where $ATP$ and $NADPH$ are produced.The enzymes required for the Calvin cycle (such as $RuBisCO$) are located in the stroma,not within the thylakoids.When thylakoids are removed and placed in a medium with $CO_2$ and $H_2O$,the light-dependent reactions may occur,but the enzymes necessary for carbon fixation and sugar synthesis are absent in the medium. Therefore,hexose sugars are not formed.

The thylakoids are removed and kept in a culture medium containing $CO_2$ and $H_2O$. If the setup is exposed to light,hexose sugars are not formed as the end product. The most appropriate reason for this is that

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