Diarrhea is one of the most common causes. It can be caused by eating wrong kind of foods or by overeating. Consumption of contaminated food can lead to bacterial or viral infection in the stomach resulting in diarrhea and cramping of stomach.
Structural Biochemistry/ATP. Adenosine triphosphate (ATP) is a nucleotide that consists of an adenosine and a ribose linked to three sequential phosphoryl (-PO32-) groups via a phosphoester bond and two phosphoanhydride bonds. ATP is the most abundant nucleotide in the cell and the primary cellular energy currency in all life forms. The primary biological importance of ATP rests in the large amount of free energy released during its hydrolysis.
The Adenosine triphosphate (ATP) molecule is the nucleotide known in biochemistry as the molecular currency of intracellular energy transfer; that is, ATP is able to store and transport chemical energy within cells. ATP also plays an important role in the synthesis of nucleic acids. For 3-D Structure of this image using Jsmol Click here . Image: Molecular Structure of ATP. Energy is released by hydrolysis of the third phosphate group. After this third phosphate group is released, the resulting ADP (adenosine diphosphate) can absorb energy and regain the group, thus regenerating an ATP molecule; this allows ATP to store energy like a rechargeable battery.