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In an Ecoli Strain i gene gets mutated and it's product can not bind the inducer molecule. If growth medium is provided with lactose, what be the outcome ?
z,y,a a genes will be transcribed
z,y,a genes will not be translated
RNA polymerase will bind thepromoter region
Only z gene will get transcribed
Answers (1)
Normally, in On condition i.e. when lactose is present in the medium, the inhibitor protein binds to the lactose and not to the operator gene. This is because the inhibitor protein has more affinity with lactose as compared to the operator gene. This will allow the z, and y & genes to undergo transcription & then translation.
In this case, 'i' gene' has been mutated due to which, even in the presence of lactose, inhibitor protein binds to the operator gene which will block the movement of RNA polymerase and z, y and genes will not undergo transcription and translation.
Hence the correct option is C.
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