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The LacI protein is released from the operator sequence upon binding of IPTG, allowing the transcription...

Question

The LacI protein is released from the operator sequence upon binding of IPTG, allowing the transcription...

The LacI protein is released from the operator sequence upon binding of IPTG, allowing the transcription of all the genes within the lac operon. In this case, LacI is called a transcriptional _______. In comparison, CRP binds to the CRP binding site sequence upon binding of cAMP, enhancing transcription. CRP is called a transcriptional _______.

Select one:

a. activator ;;;;; activator

b. activator ;;;;; repressor

c. repressor ;;;;; activator

d. repressor ;;;;; repressor

e. None of these

Answers

C is absolutely correct answer because lacI product is repressing the expression and CRP activates expression of lac operon Gene.


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