Answer:
Like the lac operon, the trp operon is a negative control mechanism. The lac operon responds to an inducer that causes the repressor to dissociate from the operator, derepressing the operon. The trp operon responds to a repressor protein that binds to two molecules of tryptophan.
Answer: C. They transport oxygen throughout the body.
It is the primary function of red blood cells.
Hope it helped!
Low concentration to high concentration
If reproduction didn't exist, all species would eventually go extinct.
For the first blank, it's cell membrane and the other blank is transport.
