Ineed to have this done soon.
upvotes for all answers

which of the following kinds of cells perform basic functions such as obtaining energy from food?
a. plant cells, but not animal cells
b. animal cells, but not plant cells
c. both plant cells and animal cells
d. neither animal cells nor plant cells

Both plant cells and animal cells obtain energy through food

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.