When the organism is resting and energy is not immediately needed, the reverse reaction takes place and the phosphate group is reattached to the molecule using energy obtained from food or sunlight.

When the organism is resting and energy is not immediately needed, the reverse reaction takes place and the phosphate group is reattached to the molecule using energy obtained from food or sunlight.

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

These molecules can be recycled so that a constant stream of energy rich ATP is available for all metabolic pathways in the cell. Almost all cellular processes need ATP to give a reaction its ...

Light energy absorbed by chlorophyll is converted into chemical energy ... which is supplied by the ATP made by the light reactions. The ATP is broken down to release energy which is used to ...