DNA polymerase catalyzes the joining of a nucleotide to a growing DNA strand. What prevents this enzyme from catalyzing the reverse reaction?
(a) hydrolysis of pyrophosphate (PPi) to inorganic phosphate (Pi) + Pi
(b) release of PPi from the nucleotide
(c) hybridization of the new strand to the template
(d) loss of ATP as an energy source
Answer: A