BIOC 4403 Lecture Notes - Lecture 21: Dna Replication, Syntrophy, Archaea
18 Apr 2016
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Document Summary
4403 ii l1- nuclear genomes and genome sequencing: features of bacterial, archaeal, organellar genomes, features of. Linear dna molecules with defined structural regions; Genes dispersed, varying amounts of repetitive dna; Translation uncoupled from replication and transcription; different compartment. Genes subject to extensive rna processing: archezoan scenario: eukaryotic features evolved prior to the endosymbiotic origin of mitochondria in a. 100,000bp and several million bp in size, between a few pairs and several hundred in number (per cell) Chromatin - proteins and protein complexes are continuously rearranging, changing their position and degree of association to dna: cycles of chromatin, influences by these dynamic changes, chromatin rearrangement, chromatin modification. In most (but not all) eukaryotes, chromatin undergoes cycles of drastic contraction in preparation for mitosis. These actions are part of both regulatory and structural processes, involved in gene expression, dna replication and cell division. For condensed chromatin, transcription is minimal or completely shut down.
