Electrons have successfully been transported from NADH through the ETC and arrived at Oxygen.. Thus far, has the ETC generated any ATP? A- yes through substrate- level phosphorylation. When an electron moved from one part of the ETC to another, this also led to a phosphate group being transferred from the ETC complete to a molecule of ADP to make ATP. B- no, as a result of electron transport some components of the ETC have pumped protons to one side of the membrane. However these protons still need to flow down their concentration gradients to cause ATP synthase to be activated and synthesize ATP

Hmmm i'm not sure about this one

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.