In a 3-year-old with fever, which occurrence might precipitate a febrile seizure?

Febrile seizure most commonly occurs in infants of 6 months of age to toddlers till 5 years old. It is characterized by fever that in most of the cases are harmless. The occurrence of  fever more than 102 degree Fahrenheit may lead to febrile seizure. Febrile seizure occurs during the first 24 hrs of high fever. These are convulsions that occurs when the child is suffering from high fever and may last for more than 15 minutes. The convulsions may involve shaking and twitching, rolling eyes and unconsciousness.
If a child had febrile seizure in the first year of life, he/she can have it again. It also depends on the parent's history of having febrile seizure.

Pro insulin undergoes extensive posttranslational modification along the production pathway .

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.