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MDCAT Biology QUESTION #4317
Question 1
Which type of RNA makes up the largest proportion of total cellular RNA?
  • Messenger RNA
  • Ribosomal RNA✔️
  • Transfer RNA
  • Catalytic RNA (ribozyme)
Correct Answer Explanation
Ribosomal RNA (rRNA) constitutes approximately 80% of total cellular RNA, making it the most abundant type. mRNA is only ~5% and tRNA ~15%.