17_Lecture%20W2011

17_Lecture%20W2011 - Chapter 17 Overview The Flow of...

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1 Chapter 17 From Gene to Protein Overview: The Flow of Genetic Information The information content of DNA is in the form of specific sequences of nucleotides The DNA inherited by an organism leads to specific traits The DNA inherited by an organism leads to specific traits by dictating the synthesis of proteins Proteins are the links between genotype and phenotype Gene expression , the process by which DNA directs protein synthesis, includes two stages: transcription and translation Flow of information from gene to protein explained Basic Principles of Transcription and Translation RNA is the intermediate between genes and the proteins for which they code Is single stranded Has ribose instead of deoxyribose and uracil instead of thyamine Transcription is the synthesis of RNA under the direction of DNA produces messenger RNA (mRNA), which carries the genetic material from DNA to the protein synthesis site Translation is the synthesis of a polypeptide, which occurs under the direction of mRNA Ribosomes are the sites of translation Basic Principles of Transcription and Translation Translation is the synthesis of a polypeptide which occurs is the synthesis of a polypeptide, which occurs under the direction of mRNA Change in language Ribosomes are the sites of translation from the nucleotide to the amino acid language
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