Q. Select the incorrect statement
A) Lactose can switch on and off the lac operon and thus, acts as inducer.
B) Lactose is the substrate for the enzyme betagalactosidase.
C) The repressor protein binds the promoter region and prevents RNA polymerase from transcribing operon.
D) Glucose or galactose cannot act as inducer for lac operon.
Explanation
The repressor protein is synthesized by the I - gene and this protein binds to the operator region so as to block the promoter region. Thus, RNA polymerase is prevented from transcribing the operon.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.