Stroma is the ground substance of which organelle?

Endoplasmic reticulum

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Mitochondria

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Nucleolus

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Chloroplast

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Solution

The correct option is D Chloroplast
The chloroplast is the green plastids, which carry on the process of photosynthesis. The chloroplast is double membrane bound organelles. The chloroplast has an internal membrane system made up of thylakoid membranes. The thylakoid membranes are embedded in a viscous ground substance called stroma. The stroma contains enzymes of Calvin cycle, hence dark reaction occurs in the stroma, whereas thylakoid membranes carry on light reaction.

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