[10000印刷√] r rna function 555873-Rrna function simple
Key Facts Ribosomal RNAs (rRNA) perform critical functions in the ribosome that allow protein synthesis to occur The genes that encode rRNAs evolve (ie change sequence over time) in a very unique manner that makes them excellent "markers" to trace evolutionary history and powerful tools to identifying species from sequence dataRibosomal RNA or rRNA It makes up about 80% of the total RNA in a cell These are synthesized in nucleolus and occur in ribosome, the protein factories of the cells Ribosomal RNA is composed of unbranhed, flexible polynucleotide chainThe 5S ribosomal RNA (5S rRNA) is an approximately 1 nucleotidelong ribosomal RNA molecule with a mass of 40 kDaIt is a structural and functional component of the large subunit of the ribosome in all domains of life (bacteria, archaea, and eukaryotes), with the exception of mitochondrial ribosomes of fungi and animalsThe designation 5S refers to the molecule's sedimentation velocity in an 281 Lec12 Transcription Rrna fu...