The dissociation constant for a particular repressor$-$operator complex is very low, about ${10}^{-13}M.$ The cellular concentration of the repressor protein is about $8{10}^{-9}M.$ How does this value compare with the dissociation constant of the repressor$-$operator complex?

This is about the same value as the dissociation constant for the repressor.

This is smaller than the dissociation constant for the repressor.

This is about eight orders of magnitude greater than the dissociation constant for the repressor.

This is about five orders of magnitude greater than the dissociation constant for the repressor.