All DNA polymerases lay down nucleotides in a ______ direction and move along the template in a _______ direction.
A)3'-5', 5'-3'
B)N-C. C-N
C)5'-3', 3'-5'
D)C-N, N-C
E)N-C, 5'-3'

Question

All DNA polymerases lay down nucleotides in a ______ direction and move along the template in a _______ direction.
A)3'->5', 5'->3'
B)N->C. C->N
C)5'->3', 3'->5'
D)C->N, N->C
E)N->C, 5'->3'

Quizplus · Accepted Answer

DNA polymerases can only add nucleotides to the 3' end of a pre-existing strand, therefore nucleotides are always added in a 5'->3' direction. As the polymerase moves along the template strand, it reads the template in a 3'->5' direction, allowing it to pair each incoming nucleotide with the complementary base on the template strand.

All DNA Polymerases Lay Down Nucleotides in a ______ Direction