BIOL 1000 Lecture Notes - Lecture 20: Methionine, Ubiquitin, Release Factor
2 Oct 2016
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Q: what role does chromatin remodelling play in the activation of gene transcription. Answer: c) it recruits activators that displace nucleosomes from the promoter. Introns have to me removed to create a mature mrna that can get translated mrna slicing. Splices sites at ends on introns recognized by small nucleaer ribonucleoproteins (cnrnps) snrnps bind with other nuclear proteins to form a spliceosome. Now you have mature rna released to cytoplasm. One gene sequence can code for more than one polypeptide, since exons can be combined in different orders. Where you take introns out, exons go in. You can end up degrade the rna. If you make to much rna and don"t need so you can break down and use its parts for something else. Dicers and mirna complex and joins to the protein complex: mirna induced silenceing complex (mirisc) degrade one strand and that goes to transcription. Therefore, mrna must contain code for each amino acid in that polypeptide.
