Answer:
look at the photo that I attatched
Tryptophan self-controls its synthesis. If we have a large amount of tryptophan in the sense that it exceeds, tryptophan would act as a co-repressor which prevents synthesis of more enzymes for its production. Hope this answers the question.
Every person has their own part to play or if you want to get scientific then a niche. And if somebody doesn't do their job then it could slow everyone else down. Maybe I don't fully understand the question, But I hope its right.
The answer is B) metaphase
B.
Photosynthesis produces energy which is used during respiration to break down carbohydrates like starch into more usable forms like glucose