Ribosomal RNA (rRNA) is best described as which type of RNA?

Ribosomal RNA (rRNA) is best described as which type of RNA?

• A. Transfer RNA
• B. Ribosomal RNA
• C. Messenger RNA
• D. Regulatory RNA

Answer: (B)

Ribosomal RNA is the RNA component of the ribosome, the molecular machine that builds proteins. It combines with ribosomal proteins to form the ribosome’s structure and provides the catalytic activity that links amino acids together to form a polypeptide chain during translation. This distinguishes it from transfer RNA, which brings amino acids to the growing chain; messenger RNA, which carries the genetic code from DNA to the ribosome; and regulatory RNA, which helps control gene expression. So its role is as the key RNA constituent of the ribosome that drives protein synthesis.

Ribosomal RNA is the RNA component of the ribosome, the molecular machine that builds proteins. It combines with ribosomal proteins to form the ribosome’s structure and provides the catalytic activity that links amino acids together to form a polypeptide chain during translation. This distinguishes it from transfer RNA, which brings amino acids to the growing chain; messenger RNA, which carries the genetic code from DNA to the ribosome; and regulatory RNA, which helps control gene expression. So its role is as the key RNA constituent of the ribosome that drives protein synthesis.