When phosphoribosyl pyrophosphate (PRPP) is used to form AMP from adenine (as well as in numerous other cell reactions) ,the reaction is rendered irreversible because
A) PRPP has such a high affinity for the enzyme involved.
B) the rate of the reaction favors formation of the product(s) .
C) this reaction is thermodynamically feasible.
D) the presence of pyrophosphatase hydrolyzes pyrophosphate formed.
E) All of the above.
Correct Answer:
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