試題詳解

56. Why is Taq polymerase used in a polymerase chain reaction (PCR)?
(A) Taq polymerase has proofreading activity and thus makes fewer errors than other DNA polymerases.
(B) Unlike other DNA polymerases, Taq polymerase is heat stable and survives the 94 °C denaturation step in PCR.
(C) Unlike other DNA polymerases, Taq polymerase is not inhibited by dideoxy nucleotides.
(D) Unlike other DNA polymerases, Taq polymerase can produce DNA from an RNA template.
(E) Taq polymerase is more efficient than other DNA polymerases.