What are the desirable features of the use of enzyme preparation for refinement of a product
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Like all other catalysts, enzymes are characterized by two fundamental properties. First, they increase the rate of chemical reactions without themselves being consumed or permanently altered by the reaction. Second, they increase reaction rates without altering the chemical equilibrium between reactants and products.

it is a learned trait

explanation:

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."