Carbohydrate
Which of the following is not involved in the biosynthesis of DNA?

Carbonic anhydrase
Enzymes
Energy from ATP
Mononucleotides

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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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