You have discovered an enzyme that can catalyze two different chemical reactions. Which of the following is most likely to be correct?

A) The enzyme contains ?-helices and ?-pleated sheets.
B) The enzyme is subject to competitive inhibition and allosteric regulation.
C) Two types of allosteric regulation occur: The binding of one molecule activates the enzyme, while the binding of a different molecule inhibits it.
D) Either the enzyme has two distinct active sites or the reactants involved in the two reactions are very similar in size and shape.


Answer: D

Biology & Microbiology

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