Carbohydrate
Citric acid accumulation would

both (b) and (c)
stimulate phosphofructokinase activity
inhibit phosphofructokinase activity
stimulate fructose 1,6 diphosphatase activity

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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

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

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Carbohydrate
Fructose diphosphate accumulation would

inhibit glycolysis and gluconeogenesis
stimulate glycolysis and gluconeogenesis
inhibit glycolysis and stimulate gluconeogenesis
stimulate glycolysis and inhibit gluconeogenesis

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