Q. In the transcriptional unit of prokaryotes: (1) various accessory proteins regulate the ability of RNA polymerase to bind to operator. (2) accessibility of promoter region is regulated by operator sequences. (3) operator region is found adjacent to promoter region. (4) the sequences of promoter bind to repressor protein. Which of the following option is most appropriate?
A) 1 and 2 are correct
B) All statements are correct
C) 2 and 3 are correct
D) 1, 2, 4 are correct
Explanation
In a prokaryotic transcriptional unit various accessory proteins sequences of operator region regulate the ability of RNA polymerase to bind to promoter region. The operator sequences bind a repressor only in the presence of an inducer.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.