Carbohydrate
Which of the following does not occur during gluconeogenesis?

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

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

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