devarshi-dt-logo

Question:

Which of the following rRNAs acts as structural RNA as well as ribozyme in bacteria?

18 S rRNA

23 S rRNA

5.8 S rRNA

5 S rRNA

Solution:

Bacteria has 70S ribosome. The 30S subunit has 16S rRNA and 50S subunit has 23S and 5S rRNA. 23S rRNA has peptidyl transferase activity and catalyzes the synthesis of peptide bond formation between amino acids in bacteria. This rRNA also serves as a structural component for the large subunit of the bacterial ribosome. Therefore, the correct answer is 23 S rRNA.