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      Question

      Which type of RNA has the highest percentage in a

      typical eukaryotic cell?
      A rRNA Correct Answer Incorrect Answer
      B mRNA Correct Answer Incorrect Answer
      C tRNA Correct Answer Incorrect Answer
      D snRNA Correct Answer Incorrect Answer

      Solution

      Ribosomal RNA (rRNA) makes up 80-85% of total cellular RNA. It plays a key role in forming ribosomes, the sites of protein synthesis. Key Points: • rRNA (80-85%)> tRNA (10-15%) > mRNA (3-5%). • rRNA is synthesized in the nucleolus. • Forms the structural and catalytic core of ribosomes.

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