40-How can understanding the gene expression pattern in a cancer cell tell you something about that specific form of cancer?
1-In E. coli, the trp operon is on by default, while the lac operon is off. Why do you think that this is the case?

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To Explain: The manner in which gene expression is controlled has an impact on the cell's overall protein levels.
Introduction:
Gene expression is the process by which genes are activated in a living cell to influence processes such as transcription and translation. To control when and how genes are expressed, this is done in both eukaryotic and prokaryotic cells.
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