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This definition of Metabolism is similar to most I've seen in biology textbooks. Metabolism: the sum of the chemical reactions that take place within each cell of a living organism and that provide energy for vital processes and for synthesizing new organic material. The broadest definition I would give for "metabolite" is any molecule that's ...


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This paragraph appears to draw a distinction between "the sum total of all reactions in cells" and "some isolated reactions that occur in cells". The former is "metabolism" and one defining trait of life; the latter are "metabolic reactions" and can occur in a test tube, and if so they do not fit tidily in a living/...


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