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Protein Synthesis

Mechanism of...

QuestionAnswer
What is Transcription? DNA --> RNA copy
What is the 1st step in Transcription? DNA Gene Segment SEPARATES (H-bonds break)
What is the 2nd Step in Transcription? ALIGNMENT of Free RIBOSE Nucleotides along Templates strand - base pairing
What is the 3rd Step in Transcription? BONDS FORMED between Phosphate groups and Ribose Sugars = Polymerization
What is the 4th Step in Transcription? Primary RNA Transcript SEPARATES from DNA
What is the 5th Step in Transcription? RNA splicing - Introns: cut OUT; Exons: spliced TOGETHER
What is the 6th Step in Transcription? processed mRNA DIFFUSES from Nucleus --> Cytoplasm
What happens chemically during step 3 of Transcritpion? ATP used; RNA Polymerease II GLUES Nucleotides together
What are the 3 types of RNA and their Polymerase enzymes? 1. mRNA: RNA Polymerase II; 2. tRNA: RNA Polymerase III; 3. rRNA: RNA Polymerase I
What is the benifit of DNA Dependent Polymerase Enzymes? NO RANDOM assembly of Nucleotides, no WASTED ATP
What is Translation? mRNA + mRNA + AA --Ribosomes--> Protein Product
What is the 1st step in Translation? mRNA DIFFUSES from Nucleus --> Cytoplasm
What is the 2nd step in Translation? ATTACHMENT to Ribosomes = (rRNA + Protein)
What is the 3rd step in Translation? tRNAs PICK UP specific AA
What is the 4th step in Translation? Exposed ANTI-Codon on tRNA forms H-bonds w/ complimentary Codon on mRNA
What is the 5th step in Translation? Peptidyl Transferase catalyze the formation of Peptide Bonds between AA --> Polypeptide --> Protein Product
What is the 6th step in Translation? tRNA FREED and REPEATS the process
Till what point are mRNA & rRNA no longer used? used until degraded by wear
How many different Codons are there? 64, same as DNA triplets
RNA substatutes what bases? substitutes Thymine with Uracil
Created by: Kristel
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