UPSC CDS 1 2023 GK Paper

Concept:RNA is present in multiple cellular compartments of plant cells, including the nucleus, cytoplasm, mitochondria, chloroplasts, and ribosomes.Explanation:RNA is synthesized in the nucleus via transcription and is processed there before export.In the cytoplasm, RNA functions in translation, RNA interference, and splicing.Mitochondria and chloroplasts each contain their own genome and produce RNA for internal protein synthesis.Ribosomes are composed partly of ribosomal RNA ($\mathrm{rRNA}$), which is essential for protein synthesis.The endoplasmic reticulum (ER) itself does not contain RNA; only ribosomes attached to it contribute $\mathrm{rRNA}$.Thus, among the options, only ribosomes (not ER) are included in option D, making it the correct comprehensive answer.Answer:Option D: nuclei, cytoplasm, mitochondria, chloroplast and ribosomes.