The process by which a final product acts as an inhibitor to the enzyme that catalyzes the commitment step in a metabolic pathway is called feedback activation. positive feedback. concerted activation. feedback inhibition. competitive inhibition.

The answer to this question would be Feedback Inhibition

Some molecule is dangerous when produced too much. That is why feedback inhibition is needed. If the final product is inhibiting the enzyme that catalyzes the reaction, reaction speed will be decreased as the final product increased. That will help keep the final product amount in a specific range.

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.