Carbohydrate
Which of the following does not occur during gluconeogenesis?

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

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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

enzyme active sites become permanently bound to substrates
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

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