Lecture_31_Guide

Lecture_31_Guide - Lecture 31 Guide November 11 S e...

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Lecture 31 Guide November 11 See EXAM 3 READINGS (Moodle), Chapter 17. Continue transcription from Lecture 30) RNA Processing  (eukaryotic cell nucleus) 1. addition of 5’ cap and poly (A) tail Pre-mRNA     protein coding segment   5’ UTR   start codon/stop codon   3’ UTR  -protection from degradation -facilitation of export from nucleus 2.  RNA splicing -removal of non-coding regions (introns), splicing of coding regions (exons)    Introns excised and exons spliced together     Translation  (synthesis of polypeptide) Translation Components 1. mRNA- m essenger RNA, from nucleus 2. tRNA- transfer RNA, “ferries” correct amino acid to ribosomes                                               a. internal base pairing with amino acid attachment b. specific anticodon matches a specific codon
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  3. A minoacyl-tRNA synthetase – catalyzes attachment of amino acid to tRNA
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This note was uploaded on 03/31/2010 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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Lecture_31_Guide - Lecture 31 Guide November 11 S e...

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