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Revision as of 09:51, 29 March 2011

Cell represses proteien synthesis gene because want to conserve ATP and carbon. Turn off energy intensive processes when running out of fuel. Turn off non-esential functions.
Dioxic shift occurs and ethanol is converted to CO2 inorder to keep producing ATP. It would switch to TCA if the energy source for glycolysis was running out. Meanwhile, it would have plenty of substrates for TCA to make ATP.
Mechanism for making sure they are induced and repressed simultaneously by transcription factors. Two kinds of transcription factors are general (bind to promoter to find location of gene) and regulatory DNA sequences (tell cell "when" and "how much"). Yeast have about 200 regulatory transcription factors for 6,000 genes. Regulate as a set by having same motif for same regulatory transcription factor. Either activators or repressors.

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+==="Better" Answers===
+*Cell represses proteien synthesis gene because want to conserve ATP and carbon. Turn off energy intensive processes when running out of fuel. Turn off non-esential functions.
+*Dioxic shift occurs and ethanol is converted to CO2 inorder to keep producing ATP. It would switch to TCA if the energy source for glycolysis was running out. Meanwhile, it would have plenty of substrates for TCA to make ATP.
+*Mechanism for making sure they are induced and repressed simultaneously by transcription factors. Two kinds of transcription factors are ''general'' (bind to promoter to find location of gene) and ''regulatory DNA sequences'' (tell cell "when" and "how much"). Yeast have about 200 regulatory transcription factors for 6,000 genes. Regulate as a set by having same motif for same regulatory transcription factor. Either activators or repressors.
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