How does the inducer change the repressor's affinity for DNA?
A)Inducer binding changes the repressor's shape so that the promoter is bent from a rectangular to a loop-like shape.
B)Inducer binding changes the repressor's shape to alter the positioning of the repressor's DNA-binding domains so they no longer interact with DNA.
C)Inducer binding makes the repressor's DNA-binding domains more positively charged,so they can no longer bind the operator.
D)Inducer binding makes the repressor's DNA-binding domains more negatively charged,so they can no longer bind the operator.

Question

Quizplus · Accepted Answer

Inducer binding changes the repressor's shape, which can alter the positioning of the repressor's DNA-binding domains so they no longer interact with DNA. This can relieve the repressor's negative regulation of gene expression, allowing transcription to occur.

How Does the Inducer Change the Repressor's Affinity for DNA