RNA .pdf - Tuesday 10:59 AM*This topic is like RNA translation by on a DNA level Random X inactivation The X in a body become inactivated but it becomes

RNA .pdf - Tuesday 10:59 AM*This topic is like RNA...

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*This topic is like RNA translation by on a DNA level Random X inactivation: The X in a body become inactivated but it becomes compact and called heterochromatin and/or euchromatin ^Packaged DNA is called heterochromatin ^Unpackaged is called euchromatin Histone modifications Acetylation of histones unwind the DNA, it becomes loosely wrapped around the histones 1. Methylation- generally resolves in heterochromatic results; blocks transcription factors 2. -Methyl groups attach to cytosine Phosphorilation 3. -Bacterial metabolism: bacteria need to respond quickly to changes in their environment ^ if they have enough of a product, they need to stop production Operon- discovered by Jacob and Monad Repressible operons functio0n in anabolic pathways ^ ex. Triptophane op The opposite of that it catabolic operons ^ lac operon DNA Sperm are haploid: they only either carry an X or a Y never both 1/29/19 Tuesday, January 29, 2019

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