Biologyfeb21 - Biol 101 21 February 2008 Code of each RNA...

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Biol 101 21 February 2008 Code of each RNA is read three letters at a time Test o Cell respiration starts test topics o No detail on photosynthesis, but on cellular level with interaction between products and reactants of the two o Lots of genetic problems o Some cell division focusing on meiosis o Information about molecular genetics and protein synthesis Protein Synthesis (ch. 13) o Protein Synthesis: initiation m-RNA attaches to small subunit Exposed AUG > t-RNA with amino acid Large subunit attaches o Elongation 2 nd t-RNA arrives Peptide bond forms between amino acids Empty t-RNA leaves, other moves over o Happens on both the free ribosomes and ribosomes on the Rough ER o Termination Stop code causes binding of releasing factor
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Unformatted text preview: Polypeptide is released Ribosomal subunits separate from message o Protein synthesis review (should have a paragraph explaining each point) DNA splits m-RNA formed m-RNA to cytoplasm m-RNA to read by ribosome t-RNA brings in appropriate amino acid called for by code Amino acid is added to chain o Know amino acids are in the cytoplasm Are picked up by transfer RNA How did they get there? – food o Mutations Changes in DNA result in mutations Point mutation/deletion – will throw off the reading frame from everything downstream Base substitution will only mess up that one particular code...
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