Carbohydrate
The conversion of pyruvate to lactate is catalysed by

lactate dehydrogenase
pyruvate dismutase
pyruvate carboxylase
pyruvate decarboxylase

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Carbohydrate
Glucagon and epinephrine

stimulates gluconeogenesis and inhibits glycolysis
inhibits gluconeogenesis and stimulates glycolysis
inhibits gluconeogenesis and glycolysis
stimulates gluconeogenesis and glycolysis

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Carbohydrate
Gluconeogenesis is the

synthesis of glucose from non-carbohydrate precursors
breakdown of glucose to pyruvate
formation of glycogen
breakdown of glycogen to glucose

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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
there is insufficient molecular motion for substrates to interact
the activation energy for the reaction is raised
enzyme active sites become permanently bound to substrates

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