When lactose is present, lac operon loses its ability to bind DNA, clearing the way for RNA transcription of the operon itself. However, without a functional CAP protein, the RNA-binding activity would be weak and would make only a few transcripts. Also, without a cap protein, the e. coli cell, would lose its ability to detect nearby glucose.
1. What would happen to transcription of the lac operon in an E. coli cell without a functional CAP protein? What would happen in a cell without a functional lac repressor?
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