Carbohydrate
During vigorous exercise, pyruvate produced by glycolysis is converted to

acetate
monosodium phosphate
lactate
pyruvic acid

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Carbohydrate
When living organisms are cooled below some critical body temperature, the metabolic reactions within their cells cease to function properly. This malfunction occurs because

there is insufficient molecular motion for substrates to interact
their enzymes lose the proper three-dimensional shape
the activation energy for the reaction is raised
enzyme active sites become permanently bound to substrates

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