In plant cells, RNA is present in

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cytoplasm only

nuclei and cytoplasm only

nuclei, cytoplasm, mitochondria, chloroplast and endoplasmic reticulum

nuclei, cytoplasm, mitochondria, chloroplast and ribosomes

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UPSC CDS-1 – 2023

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In plant cells, RNA is found in various locations: the nucleus (where transcription occurs and various RNAs are synthesized and processed), the cytoplasm (containing mRNA, tRNA, rRNA, and free ribosomes), mitochondria (with their own genetic material and protein synthesis machinery, including rRNA and tRNA), chloroplasts (similarly having their own genetic material and protein synthesis machinery, including rRNA and tRNA), and ribosomes (which are themselves composed of rRNA and proteins, and are the sites of protein synthesis using mRNA and tRNA).

RNA’s presence in mitochondria and chloroplasts reflects their endosymbiotic origin and semi-autonomous nature, possessing their own genetic systems.

Endoplasmic Reticulum (ER) is involved in protein synthesis via ribosomes attached to its surface (RER), but RNA itself is not considered a component of the ER membrane or lumen; it is associated with the ribosomes on the ER.

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