The figure below shows a regulatory being produced on the left. Based on the information in the figure, this protein must function in which of the following ways?
A) When glucose binds to it, the protein binds to the regulatory sequence and prevents transcription of the target gene.
B) This protein must influence a hairpin sequence and thus fine tunes the operon.
C) In the presence of the end product of the operon, this protein will bind to the regulatory region and acts as an activator.
D) When a ligand is or is not bound, this protein may act as either an activator or repressor.
E) This protein would not have an effect on transcription of the target gene.

Question

The figure below shows a regulatory being produced on the left. Based on the information in the figure, this protein must function in which of the following ways? 
A) When glucose binds to it, the protein binds to the regulatory sequence and prevents transcription of the target gene. 
B) This protein must influence a hairpin sequence and thus fine tunes the operon. 
C) In the presence of the end product of the operon, this protein will bind to the regulatory region and acts as an activator. 
D) When a ligand is or is not bound, this protein may act as either an activator or repressor. 
E) This protein would not have an effect on transcription of the target gene.

Quizplus · Accepted Answer

The figure shows that the regulatory protein can bind to the regulatory region both in the presence and absence of a ligand. This suggests that the protein can act as both an activator and repressor depending on whether or not a ligand is bound.

The Figure Below Shows a Regulatory Being Produced on the Left