21_Lieb_RNA_Transcription - RNA and Transcription J Lieb A...

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RNA and  Transcription March 03, 2008 J. Lieb A representation of Phage T7 RNA  Polymerase (blue) making RNA (red)  from a DNA template (strands colored  yellow and orange). In your book: Chapter 8
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In biology, information flows from DNA               RNA             Protein Replication DNA Polymerase Transcription Translation RNA Polymerase Ribosome Process in Black,  Enzyme in Blue Enzymes are proteins that catalyze  a specific biochemical reaction Kind of like a computer
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  Cellular machinery is largely made up of proteins .     Proteins are made up of chains or sequences of amino acids .     The sequence of these amino acids are "encoded" in the cell's  DNA. DNA is  transcribed  into RNA, which is then  translated  into  protein.   When one gene  is mutated, one protein  (a machine) is affected  (usually disabled). As a general rule,  one gene encodes one protein
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Molecular Biology Occurs at an Unfamiliar Scale If a mouse  were the size of Chapel Hill (10 miles)  a cell would be about the size of a volleyball (8 inches in  diameter)   a gene would be on average about an inch long.  About 10 14  cells in a human body (100 trillion). And 20 times that  number of bacteria! If a cell  were the size of Chapel Hill (10 miles):    an average protein would be the size of a Volvo (10 feet)   an average gene would be about 1.5 miles long but the  strand of DNA would only be a few feet wide.
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