Carbohydrate
Which of the following characteristic enzymes of gluconeogensis is not found in the cytosol?

Both (a) and (b)
Pyruvate carboxlyase
Fructose-l,6-bisphosphatase
Glucose-6-phosphatase

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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
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
Which of the following statements about the energy needs of cells is false?

Many cellular reactions have an associated activation energy
The most usable energy for cells comes from the rapid combustion of glucose
The laws of thermodynamics force cells to acquire energy
Without a continuous input of energy, cell disorder will increase

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