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Zusammenfassung Genetik - Transkription

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Einführung in die Genetik: Transkription Aufbau, Funktion, Verlauf… Lernzettel für das Abitur 2025

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Institution
Secondary school
Study
Gymnasium
Course
School year
1

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Uploaded on
March 9, 2025
Number of pages
1
Written in
2024/2025
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Summary

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TRANSKRIPTION

1
. TEILSCHRITT DER PROTEINBIOSYNTHESE




1 INITIATION :
RNA-POLYMERASE
.
Dan Euzyen Katalysiert die Synthese von RNA aus DNA


benötigt kein Primer

-
Promotor wird für die Initiation benötigt butimmte DNA-Sequenz , an der


die RNA-Polymerase binden kann (viel A und T)


-Transkriptionsfaktoren Setzen an Promotor an - verändern räumliche Struttter


>
-


RNA-Polymeras bindet =>
Transkription wird im
Gang gesetzt
Promotor
Sequent kontrollmechanismus
-
=




↳ teilt RNA-Polymerase mit wo die Transkription beginnt und welche


DNA-Strang transferibiert wird



Nach binden >
-




an die DNA- RNA-Polymerase entspiralisiert die DNA und löst


WSBB auf




2
. ELONGATION :
1
Strang wird als Matritze (Vorlage) für die nach
folgende Verknüpfung von



RNA-Nukleotiden verwendet




-codogener Strang transkribierter
=
Strang I nicht-codogener-Strang
5-3 Ande
Verlauf transkribierten Strange
-
-


des



-Bassequenz der DNA in RNA
geschrieben
Synthese Meer RNA- Nukleotide durch die RNA-Polymerase solange bis sie
-




auf eine TERMINATORSEQUENZ stößt




3 TERMINATION :
RNA-Polymerase löst DNA
.
-


sich von der



RNA-Transkript wird
freigesetzt ims Zytoployea >
-

(prä) mRNA

-prä-mRNA-INFOS UR EUR PROTEINBIOSYNTHESE
>
-

Ribosomen

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