But how do cells get this energy in the first ... molecules into more readily usable forms — often energy-rich carrier molecules. Adenosine 5'-triphosphate, or ATP, is the most abundant energy ...

ATP (adenosine triphosphate) is the energy-carrying molecule used in cells because it can release energy very quickly. Energy is released from ATP when the end phosphate is removed. Once ATP has ...

Now, this is not an open invitation to eat more of whatever you want. Instead, we need to understand more about how calories—energy—work in conjunction with nutrients. Calories are a measure of ...