Carbohydrate
Which of the following does not occur during gluconeogenesis?

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

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

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Carbohydrate
The glycosidic bond

in sucrose is hydrolyzed by bees
joins glucose and fructose to form sucrose
both (b) and (c)
in maltose is not hydrolyzed in lactose intolerant humans

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