Ribosomal RNA (rRNA)

Definition

Ribosomal RNA (rRNA) is a type of RNA that combines with proteins to form ribosomes. These ribosomes are the cellular structures where protein synthesis occurs.

5 Must Know Facts For Your Next Test

1. rRNA is a crucial component of the ribosome's structure and function.
2. There are three main types of rRNA in prokaryotes: 16S, 23S, and 5S rRNA.
3. In eukaryotes, the main types include 18S, 28S, 5.8S, and 5S rRNA.
4. rRNA genes are highly conserved across different species due to their essential role in protein synthesis.
5. rRNA helps catalyze the formation of peptide bonds between amino acids during translation.

Review Questions

• What role does rRNA play in protein synthesis?
• Name the different types of rRNA found in prokaryotes and eukaryotes.
• Why are rRNA genes considered highly conserved?

Related terms

mRNA:

Messenger RNA carries genetic information from DNA to the ribosome for protein synthesis

tRNA:

Transfer RNA brings amino acids to the ribosome during translation

Ribosome: A molecular machine composed of rRNA and proteins that facilitates protein synthesis