2. How do living things release the energy, explain the process of C. R. 3. How does cellular respiration differ from photosynthesis?
4. What is the role of ATP in cellular activities?
5. How do cells obtain and transform the energy required for biological processes?
6. What is the connection between photosynthesis and cellular respiration?
7. Where does photosynthesis occur in the cell? Where does cellular respiration occur in the cell?
8. Which type of respiration is more effective and explain why?
9. What are the by-products of yeast fermentation?

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.