References] Which of the following best describes the functioning of the lac rep

Question

References] Which of the following best describes the functioning of the lac repressor protein? OA. In the presence of allolactose the protein binds the operator, thereby inhibiting transcription. B. In the absence of allolactose the protein binds the operator, thereby enhancing transcription. C. In the presence of allolactose the protein binds the operator, thereby enhancing transcription. OD. In the absence of allolactose the protein binds the operator, thereby inhibiting transcription. E. None of the above. Submit Answer Try Another Version 5 item attempts remaining ts ts ots ots

Explanation / Answer

E. In the absence of allolactose the protein binds the operator, thereby inhibiting transcription

This is because the presence of allolactose causes conformational changes to occur within the lac repressor protein making it incapable of interacting with the operator.

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