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Prokaryotic translation

Chapter 17 powerpoint

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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 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 Copyright ? 2008 Pearson Education Inc., publishing as Pearson Benjamin Cummings Fig. 17-1 Concept 17.1: Genes specify proteins via transcription and translation How was the fundamental relationship between genes and proteins discovered? Copyright ? 2008 Pearson Education Inc., publishing as Pearson Benjamin Cummings

ap_bio_chap_14_transcription_translation.ppt

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0 14 Gene Expression: From Gene to Protein Overview: The Flow of Genetic Information The information content of genes is in the form of specific sequences of nucleotides in DNA 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 Concept 14.1: Genes specify proteins via transcription and translation How was the fundamental relationship between genes and proteins discovered? Evidence from the Study of Metabolic Defects In 1902, British physician Archibald Garrod first suggested that genes dictate phenotypes through enzymes that catalyze specific chemical reactions

AP Biology Chapter 17 Notes Campbell/Reece

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AP Biology Chapter 17 (17.3 and 17.4) 17.3 Eukaryotic cells modify RNA after transcription RNA Processing: in the nucleus ? before it is sent out to the cytoplasm. both ends of the primary transcript are altered certain interior sections are cut out A. Alternation of mRNA Ends (Figure 17.9) Both ends of the mRNA are modified in a particular way 5prime end ? 5prime cap made of modified form of a Guanine nucleotide 3prime end ? poly A tail - 50 to 250 Adenine (A) nucleotides are added. Remember, the mRNA is released soon after the signal AAUAAA is transcribed. So even more A is added on after that. Functions of 5prime cap and poly A tail: facilitate export of the mature mRNA from the nucleus protect the mRNA from degradation by hydrolytic enzymes.
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