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Vocab

ch 17

TermDefinition
Transcription turning DNA into RNA
RNA Polymerase enzyme that builds the RNA polymer
Prokaryotic (RNA Polymerase) RNA polymerase (only 1)
Eukaryotic (RNA Polymerase) RNA pol I,II, III
The Promoter sequence of DNA that is where transcription is initiated
The Terminator sequence of DNA (in bacteria) that signals the end of transcription
The Transcription Unit the DNA that lies between the Promoter and the Terminator
Step 1 of Transcription Initiation
Prokaryotic (Step 1) RNA polymerase recognized the promoter and binds to it
Eukaryotic (Step 1) promoter contains TATA box (RNA pol II)
Step 2 of Transcription Elongation -RNA pol adds nucleotides & unwinds strand -RNA transcript peals away from DNA after made & DNA retwists
Step 3 of Transcription Termination
Proks (Step 3) once the terminator is transcribed RNA pol falls off & releases the mRNA transcript
Euks (Step 3) RNA pol continues until transcribes a signal called polyadenylation signal (AAUAA)
AUG thymine & start codon
UAA, UAG, UGA stop codons
anticodon attached to tRNA, and looks for mRNA
Step 1 of tRNA charging tRNA -putting appropriate amino acid on the tRNA
Step 2 of tRNA initiation of translation (look at figure in notes)
Step 3 of tRNA Elongation (4 steps in notes)
Step 4 of tRNA Termination - when a stop codon reaches the A site & releases factor (protein) binds in A site which causes polypeptide to be released (by hydrolysis)
Silent Mutation -A instead of G -no effect on amino acid sequence
Missense Mutation -T instead of C -a wrong amino acid
Nonsense Mutation -A instead of T -a stop codon where it shouldn't be
Created by: 100000779212541
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