Chapter 17 From Gene to Protein

Chapter 17 From Gene to Protein - Chapter 17 From Gene to...

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Chapter 17 From Gene to Protein Basic Principles of Transcription and Translation - Transcription is the nucleotide to nucleotide transfer of information from DNA to RNA - Translation is the informational transfer from nucleotide sequence in RNA to amino acid sequence in a polypeptide. The Genetic Code - Genetic information is encoded as a sequence of non-overlapping base triplets or codons. - A codon in mRNA is either translated into an amino acid (61 codons) or serves as a translation stop signal (3 codons) - Codons must be read in the correct reading frame for the specific polypeptide to be produced. - Codon: 1. Consists of three nucleotides 2. Basic unit of the genetic code 3. May encode for the same amino acid as another codon 4. It never codes for more than one amino acid 5. Codon codes are universal (Same for prokaryotes and eukaryotes) Molecular Components of Transcription - DNA is used as the template to synthesis RNA
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- RNA synthesis is catalyzed by RNA polymerase - RNA polymerase can synthesize RNA without the use of a primer (Unlike
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This note was uploaded on 04/07/2008 for the course BIO 126 taught by Professor Borghjid during the Fall '07 term at Molloy.

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Chapter 17 From Gene to Protein - Chapter 17 From Gene to...

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