Carbohydrate
Pyruvate is initially converted to which of the following in the gluconeogenesis?

Oxaloacetate
Glycerol
Acetyl CoA
Phosphoenol pyruvate

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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

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

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