Refer the given diagrammatical sections of mitochondrion (i) and chloroplast (ii), in which some of the parts have been incorrectly labelled. Identify them and select the correct option.

80 S ribosomes, Grana thylakoids

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Oxysomes, Grana thylakoids

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Mitochondrial DNA, Chloroplast DNA

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80 S ribosomes, Stroma

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Solution

The correct option is A 80 S ribosomes, Grana thylakoids
Mitochondrial ribosomes are 55 S to 70 S in nature and thus resemble the ribosomes of prokaryotes. In chloroplasts, thylakoids are membrane lined flattened sacs which run throughout stroma or matrix of chloroplast. They stack at places to form grana. Stroma thylakoid connects one grana to another.

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