Chapter%2017%20Outline

Chapter%2017%20Outline - Chapter 17 From Gene to Protein...

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Unformatted text preview: Chapter 17 - From Gene to Protein • The Flow of Genetic Information – specific sequences of nucleotides – protein synthesis • transcription and translation • Genes code for – polypeptide chains – RNA molecules Basic Principles of Transcription and Translation • Transcription – synthesis of RNA • under the direction of DNA – messenger RNA (mRNA) • Translation – synthesis of a polypeptide • under the direction of mRNA – Occurs on ribosomes • Cells are governed by a cellular chain of command – DNA → RNA → protein During transcription • gene determines the sequence of bases Figure 17.4 Figure 17.3 Codons: Triplets of Bases • sequence of nonoverlapping base triplets – Codons – Read in the 5’ → 3’ direction • correct reading frame • thereddogatethecat • hereddogatethecat • her/edd/oga/tet/hec/at Cracking the Code Fig 17.5 • The stages of transcription are – Initiation – Elongation – Termination Fig 17.7 Synthesis of an RNA Transcript...
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Chapter%2017%20Outline - Chapter 17 From Gene to Protein...

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