試題詳解

24. Primers are used in both PCR and in DNA sequencing. What is the purpose of the primers?
(A) to separate the DNA template strands.
(B) to provide a 3'- OH for DNA polymerase to build a new DNA strand.
(C) to terminate synthesis of the growing DNA strand.
(D) to separate various-sized DNA products.
(E) to add nucleotides to a growing DNA strand.