BIOL 3332 Lecture Notes - Lecture 15: Transfer Rna, Polysome, Sigma Factor

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Transcription: dna rna: you need: Promoter to which rna polymerase binds. Rna polymerase would transcribe any stretch of dna, needs to be directed to the appropriate area by . Sigma factors = directs rna polymerase: allows it to bind to the promoter. Translation: rna protein: you need: Shine delgarno sequence ribosomal binding sequence of transcript. Polysome= multiple ribosomes translating rna different proteins if they begin translating at different regions of the rna. Charged trna = has amino acid residue attached. Ribosomal rna, transfer rna: these are transcribed by rna polymerase, are not translated, retained in their rna form, they form structures in the rna form. Enzymes like protease cleave the structures to form trna and. Bacterial rna polymerase rrna: known as a holoenzyme because it consists of the core polymerase plus the sigma factor. Sigma needed to initiate transcription at the promoter.

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