Which type of RNA forms the core component of ribosomes?

Which type of RNA forms the core component of ribosomes?

• A. Messenger RNA
• B. Ribosomal RNA
• C. Transfer RNA
• D. Small Nuclear RNA

Answer: (B)

Ribosomal RNA forms the heart of the ribosome. Ribosomes are ribonucleoprotein particles, and the RNA components do more than just scaffold them—they carry the catalytic activity that aligns the mRNA and tRNAs and forms the peptide bonds between amino acids. In both bacteria and eukaryotes, the RNA in the large subunit provides the peptidyl transferase center, making the RNA itself the functional core of translation. By contrast, messenger RNA serves as the genetic template, transfer RNA brings amino acids, and small nuclear RNA participates in RNA processing in the nucleus. So the RNA that forms the core of ribosomes is ribosomal RNA.

Ribosomal RNA forms the heart of the ribosome. Ribosomes are ribonucleoprotein particles, and the RNA components do more than just scaffold them—they carry the catalytic activity that aligns the mRNA and tRNAs and forms the peptide bonds between amino acids. In both bacteria and eukaryotes, the RNA in the large subunit provides the peptidyl transferase center, making the RNA itself the functional core of translation. By contrast, messenger RNA serves as the genetic template, transfer RNA brings amino acids, and small nuclear RNA participates in RNA processing in the nucleus. So the RNA that forms the core of ribosomes is ribosomal RNA.