Carbohydrate
Which of the following is carried out when cAMP functions as a second messenger?

Activates the cAMP-dependent protein kinase
Acts second in importance to AMP
Activates all cytosolic protein kinases
Acts outside the cell to influence cellular processes

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Carbohydrate
Insulin

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

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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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Carbohydrate
Which of the following does not occur during gluconeogenesis?

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

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