[...]... substances across membranes The processes of photosynthesis and metabolism of nutrients are used mainly to produce ATP It is probably no exaggeration to call ATP the single most important substance in biochemistry The average adult human generates enough metabolic energy to synthesize his or her own weight in ATP every day ATP is produced in the cell from ADP as a result of three types of phosphorylations . edition of Biochemistry by Mathews, van Holde, and Ahern. At a time when major technological advances are occurring in both electronics and biochemistry, . Molecules 6-Mercaptopurine 3'-Azido-2',3'-dideoxythymidine (AZT) Isoproterenol What is Biochemistry? Goals of Biochemistry Describe structure, organization, function of cells