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BSC 2010C Chapter 17

Chapter 17

QuestionAnswer
Transcription -DNA->RNA -DNA-template -In the Nucleus
Center Domga DNA->RNA->Protein
Steps of Transcription 1.RNA polymerase binds to promote region (TATA box) 2.Double Helix unwinds 3.RNA polymerase begins to synthesize - by adding nucleotides 4.Termination, synthesis will stop, RNA released
In a Prokaryote, within a nucleus... (coupled) transcription and translation occurs at the same time
In a Eukaryote, within a nucleus... Transcription happens within a ribosomal. Translation happens within a cytoplasm.
TATA Box Promotor Region
Poly A Tail 3' end
5' cap 5' end
Translation - RNA to Protein - on ribosomes in cytoplasm - 2 ribosomal subunits - tRNA E site P Site A Site - mRNA
E Site exit, protein exits
P Site first Amino Acid enters, holds Polypeptide chain
A Site all other Amino Acids enter the site
Termination - stops codon (A Site) - Dissemble: relases protein
3 types of Mutation 1.Silent Mutation 2.Missense Mutation 3.Nonsense Mutation
Silent Mutation - no effect - still codes for same Amino Acid
Missense Mutation - codes for a new Amino Acid
Nonsense Mutation *The worst of all mutation* - stop a codon on in early stage
DNA is Code
mRNA is Codon
tRNA is Anticodon
Created by: 657791744
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