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Transcript
DNA Structure The Flow of Genetic Information from DNA to RNA to Protein – DNA functions as the inherited directions for a cell or organism. Copyright © 2007 Pearson Education, Inc. publishing as Pearson Benjamin Cummings From Nucleotides to Amino Acids: An Overview – Genetic information in DNA is transcribed into RNA and then translated into polypeptides (proteins). Transcription: From DNA to RNA – In transcription, • Genetic information is transferred from DNA to RNA. • RNA polymerase is the enzyme for the job. Messenger RNA (mRNA) – What are the rules for translating the RNA message into a polypeptide? – Triplets of bases • Specify all the amino acids. • Are called codons. The Genetic Code – A fully assembled ribosome holds tRNA and mRNA for use in translation. http://www.youtube.com/watch?v=TSv-Rq5C3K8 Start at min 3:00 Review: DNA RNA Protein Copyright © 2007 Pearson Education, Inc. publishing as Pearson Benjamin Cummings RNA polymerase Ribosome
