BIO 1140 Lecture Notes - Stop Codon, Start Codon, Wobble Base Pair
22 Dec 2012
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Document Summary
Trnas are small rnas of highly distinctive structure that brings amino acids to the ribosome adaptor hypothesis. Hypothesizes that there had to be something that allowed information recognized as nucleic acid to become information recognized as this is found in the form of trna, which has an anti-codon amino acid (known as the cognate trna) Ribosomes are rrna-protein complexes that work as automated protein assembly machines. Translation initiation brings the ribosomal subunits, an mrna, and the first aminoacyl-trna together. Ribosomes exist as large and small subunits and only assemble as a. -multiple ribosomes simultaneously translate a single mrna; this is ribosome with the message known as a polysome. Polypeptide chains grow during the elongation stage of translation. Occurs by the transfer peptide chain onto another amino acid. Termination releases a completed polypeptide from the ribosome and the ribosome fall apart as their respective subunits. Newly synthesized polypeptides are processed and folded into finished form.
