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Unformatted text preview: right ones. small nuclear RNA part of
protein complex that splices out introns. For
transcription we need a coding sequence and a
regulatory unit. RNA polymerase III transcribes tRNA, 5S rRNA, some snRNAs and
scRNAs (cytoplasmic) 13 BIO 1140 Unit 2-2: Transcription Transcription Overview Begins as RNA polymerase binds to DNA DNA double helix begins to unwind RNA polymerase adds RNA nucleotides sequentially according to the DNA template Enzyme and completed RNA transcript release from DNA template Key terminology: (controls everything) Promoter: Control sequence initiates transcription Transcription unit: Portion of gene that is copied into RNA Terminator: Signals the end of transcription of a gene (copies everything) where to stop
14 BIO 1140 Unit 2-2: Transcription Transcription Overview: RNA polymerase catalyses the polymerization of ribonucleoside 5’-triphosphates(rNTP or
NTP) does not require a primer, transcription is initiated de novo. initiates synthesis at ‘promoter’ sequences on DNA, upstream (5’) to the
transcription start site. Other...
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This note was uploaded on 03/26/2014 for the course BIO 1140 taught by Professor Fenwick during the Winter '07 term at University of Ottawa.
- Winter '07