16.Which of the following can be extended by DNA polymerase?
(A)a single strand DNA end in a deoxyribonucleotide with free 5'-P
(B) a RNA single strand with a ribonucleotide with a free 3'-OH
(C) a single strand of DNA ending in a nucleotide with a free 3'-OH
(D)a RNA single strand
(E)all of the above

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