BISC300 Lecture Notes - Lecture 14: Transcription Bubble, Groel, Start Codon
27 Oct 2017
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Lecture xiv bacterial genome replication and expression continued. Transcription initiation: occurs at promotors rna pol binding site, promoter itself is not transcribed, typical promoter sequence has two regions one is a -10 sequence and one is a - Transcription cycle produces messenger rna; since no nuclear membrane, it"s now in the cytoplasm and is available to ribosomes. Ribosomes translate the mrna according to a genetic code. The genetic code example of gene to mrna to protein: there are different genetic codes, untranslated region; start codon (most often aug, but a small fraction are gug or. The ribosome 2: matches trna with mrna, way of linking and studying evolution of organisms because all cellular life has ribosomes; and the sequences for ribosomes are recognizable throughout all life, bacteria 30s + 50s = 70s. Dna replication in archaea: archaeal chromosomes are more similar to bacteria than eukaryotes (e. g. size, circular, however, some archaea have histones associated with their chromosomes.
