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Ribosomal RNA is actively synthesized in:

1. Lysosomes
2. Nucleolus
3. Nucleoplasm
4. Ribosomes

Correct answer: Nucleolus

Solution

The nucleolus is the cellular site where ribosomal RNA is transcribed and processed, and where ribosomal subunits begin assembling. Lysosomes digest materials, ribosomes translate proteins, and nucleoplasm is just the nuclear fluid matrix.

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