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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Carbohydrate
Gluconeogenesis is the

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

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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 PEP to fructose bisphosphate
The conversion of pyruvate to phosphoenolpyruvate (PEP)

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