BIOL 200 Study Guide - Final Guide: Barcode, Histone H2A, Retrotransposon
20 May 2012
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Document Summary
Dna template: serve as a blueprint for the rn sequence ribonucleotides serve as monomers for rna polymerixation rna polymerase, dna dependant rna polymerase catalyze the synthesis of rna. Prokayrotes: compact, circular genomes, genes of similar function are grouped together, no nucleus (genome sits in the periplasm) transcribe the entire rna trp mrna: start sites for protein synthesis (polycistronic mrna) rarely happens in eukaryotes. No modular format all on the same promoter: eukaryotes: different promoters. Eukaryotic transcription results in multiple mrna"s: specific for each protein theoretically one ribosome to transcribe each mrna. Post-transcriptional modification addition of the 5" cap addition of the 3" poly-a tail splicing. Performed by dna polymerase: dna dependent dna polymerase requires dntp"s. Proceeds in a 5" -> 3" direction requires a primer (dna or rna) Topoisomerase: relieves supercoils found in prokaryotes & eukaryotes: binds upstream to the replication fork (far enough away to do it"s job) Helicase: unwinds duplex dna rate limiting step in dna replication.
