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Adenosine triphosphate (ATP): a compound consisting of an adenosine molecule bonded to three phosphate groups, present in all living tissue. The breakage of one phosphate linkage (to form adenosine diphosphateADP) provides energy for physiological processes such as muscular contraction

-saccharide: another term for sugar

Protoplasm: the colorless material comprising the living part of a cell, including the cytoplasm and nucleus..