In the absence of glucose, when lactose is present it combines with the repressor, allowing RNA polymerase to carry on transcription.
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Our tutors have indicated that to solve this problem you will need to apply the Bacterial Gene Regulation concept. You can view video lessons to learn Bacterial Gene Regulation. Or if you need more Bacterial Gene Regulation practice, you can also practice Bacterial Gene Regulation practice problems.
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Based on our data, we think this problem is relevant for Professor Brinn's class at FIU.