It is only 10% efficient because the majority of the energy is converted. Some is lost in heat, some is not processed at all. Mostly a lot of energy is used to regenerate ATP.
Answer:
Negative regulation
Explanation:
In the trp operon, tryptophan binds to the repressor protein, then this complex binds to operator effectively blocking gene transcription preventing the production of enzymes that aids in the synthesis of tryptophan. This happens when high levels of tryptophan is detected. This, it is a repressible/negative type of regulation.
The nucleus tells the cell what to do, and also contains chromosomes, which has the cell's genetic material.
