Biology And Biomedical Sciences BIOL 2960 Study Guide - Final Guide: Ribozyme, Dicer, Prokaryotic Large Ribosomal Subunit
5 May 2017
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Document Summary
Rna processing: 5" and 3" end modifications, capping at the 5" end of mrna occurs shortly after transcription begins. Atp is split into ap and ppi, the former is used in the polya tail: the polya tail is untemplated, meaning that it is not transcribed directly from template dna. It is assembled post-cleavage: result: aauaaa (cleavage signal) - aaaaa(a)n (polya tail) - oh 3". Introns are generally large sequences and make up most of the dna. Introns are the rna sequences that will be removed from the completed. Rna before translation, and are therefore not included in coding for proteins: exons are small sequences. Rna modification and will ultimately code for proteins: splicing consensus sequences and chemistry. Important locations (1) the 5" splice site occurs at the 5" position of the gu of the intron. (2) branch site a is where the 5" splice site of the spliced intron will ultimately attach to form a lariat .
