Carbohydrate
A catabolic intermediate which stimulates phosphofructokinase would stimulate

glycolysis
gluconeogenesis
glycogen synthesis
none of these

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Carbohydrate
Insulin

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

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Carbohydrate
Which of the following does not occur during gluconeogenesis?

The carboxylation of pyruvate to oxaloacetate
The decarboxylation of oxaloacetate to phosphoenolpyruvate
The conversion of pyruvate to phosphoenolpyruvate (PEP)
The conversion of PEP to fructose bisphosphate

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

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