The major way in which therapeutic cloning and reproductive cloning differ is that reproductive cloning cannot in reality be accomplished, while therapeutic cloning can.

therapeutic cloning seeks to provide cells and tissues for use in treatment of human diseases.

reproductive cloning can only be done in plants, therapeutic cloning only in animals.

reproductive cloning uses adult stem cells, therapeutic cloning uses embryonic stem cells.

There is no difference: both processes seek to obtain a genetically pure individual.

B

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.