What happens when the conc. of trp is too low?
Due to this, what does it mean for the repressor?
The repressor no longer binds to DNA and the tryptophan operon is transcribed.
It is a molecular switch that works according to the availability of the end product of the pathway that the enzymes catalyze, when too much, the repressor binds to the operon, when too low, it doesn't and operon is transcribed.