Given above is a schematic representation of the lac operon in E.coli. What is the significant role of 'i' gene in switching on or off the operon ? (2 marks)
'i' gene codes for the synthesis of repressor of the lac operon. The repressor protein binds to the operator region of the operon. RNA polymerase is not able to bind with the operator, so there will be no transcription of operon.