Carbohydrate
Which of the following enzymes plays an important role in the Cori " cycle?

Lactate dehydrogenase
Glucose isomerase
Glucokinase
Glucose-6-phosphate dehydrogenase

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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
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

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