In naturally occurring bacterial systems, tetracycline binding repressor protein binds in the _____ of tetracycline to the control sequence and _______ transcription.
(a) presence, activates
(b) absence, activates
(c) absence, inactivates
(d) presence, inactivates
This question was addressed to me by my school teacher while I was bunking the class.
My query is from Cultured Cells in Mammals and Restricted Areas in Intact Organisms in section Using Other Organisms of Genetic Engineering