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Unformatted text preview: depends on how well they explain it. (3pts) The lifespan of the mRNA is short so translation of the β subunit occurs but the mRNA starts degrading before enough α can be made (2pts) The difference can be explained because the toxin is in a 1:5 ratio so the function of β is much more necessary than the function of α (2pts) The ratio of the subunits is 1:5 because it takes 5 β subunits and 1 α to create the toxin (2pts) A combination of mentioning that β has more active binding sites and this somehow relates to the secondary strucure of mRNA and more/less activity. They fail to mention if they are talking about transcription/translation and if they mean ribosome binding sites. (0pt) Focusing primarily on trancription of the lac operon and how it relates to cholera in a way I can’t understand. . Some also say that the β subunit IS lacI and the α IS lacy. I don’t know what they are getting at...
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This note was uploaded on 12/06/2009 for the course BIO 172 taught by Professor Clark during the Spring '08 term at University of Michigan.
- Spring '08