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Question

Where does the primary photochemical reaction occurs in chloroplast ? Where does the light reaction of photosynthesis taken place?

A
Stroma
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B
Endoplasmic reticulum
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C
Quantasome or thylakoids (Grana)
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D
Inner membrane of chloroplast
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Solution

The correct option is C Quantasome or thylakoids (Grana)
In the chloroplast, the primary photochemical reactions occur. During photosynthesis, primary reactions like the light-capturing and ATP-generating reactions occur on grana. Grana are stakes of thylakoids. Quantasomes are particles found in grana. During photosynthesis, the light-dependent reactions take place on the thylakoid membranes. The inside of the thylakoid membrane is called the lumen. Light-independent reactions take place in the stroma.
Thus, the correct answer is 'Quantasome or thylakoids (Grana).'

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