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Transcription (Termination (ending of transcription, and occurs when RNA…
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Transcription
ending of transcription, and occurs when RNA polymerase crosses a stop (termination) sequence in the gene.
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- RNA Polymerase Promoter Complex binds to the promoter gene in the DNA.
- DNA to unwind so the enzyme can ‘‘read’’ the bases in one of the DNA strands.
- Enzyme is ready to make a strand of mRNA with a complementary sequence of bases
- RNA polymerase reads the unwound DNA strand and builds the mRNA molecule ( using complementary base pairs )
- an adenine (A) in the DNA binds to an uracil (U) in the RNA.
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Translation
Initiation
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An initiator tRNA molecule binds to the start codon, AUG
The large subunit binds, which completes the complex.
Elongation
Ribosome binding sites
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P site
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The ribosome moves down the chain three bases, shifting the tRNAs from sites A -> P and P ->E.
A tRNA carrying the next AA binds to the A site of the ribosome. The tRNA in the P site holds the current chain.
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Transcription is the process in which a gene's DNA sequence is copied (transcribed) to make an RNA molecule