ch2classnotes

ch2classnotes - Ch. 2 class notes nucleic acids dna and rna...

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Ch. 2 class notes - nucleic acids – dna and rna o proteins necessary – rna polymerase – will build rna and copy dna in order for transcription o can’t transcribe dna without rna polymerase o proteins made up from amino acids - glycams – saccarides = sugars - lipids = fat-like substances and make up membranes - dna is perfect for reproducing because of double helix structure o linear molecule – up to 2 meters in length o lives in nucleus of cell so no damage o need to be condensed/compressed thousands of times - packaging of dna is compressing = called chromatin o composed of histones - have to open coil to get transcription - histone acytale transferase – transfers acetyle group - 3 acytle groups are added – act as crowbar coch3 o get other proteins in o make rna transcript = copy of dna o rna can leave nucleus - pores in membrane for rna to slip through and get into cytoplasm of cell o ribosome pick up rna from cytoplasm o using rna to synthesize new protein = called translation o folding process to get protein into right shape o every cell except blood has enough dna to create full clone - differentiation = dna for everything is turned off and small amount is on/expressed o epigenetics = controlling extression of genes - methylase – add methyl group = ch3= simplest organ structure o prevents extression/transcription until removed
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This note was uploaded on 09/26/2010 for the course PSYCH 1071 taught by Professor Curby during the Fall '08 term at Temple.

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ch2classnotes - Ch. 2 class notes nucleic acids dna and rna...

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