Which of the following is a reason that a new DNA strand elongates only in the 5' to 3' direction during DNA replication?
A) DNA polymerase begins adding nucleotides at the 3' end of the template.
B) Single stranded binding protein stabilizes DNA by blocking access to the 5' end.
C) Replication must progress toward the replication fork.
D) Dehydration reactions require a free -OH group.

Question

Quizplus · Accepted Answer

DNA polymerase can only add nucleotides to the free 3' -OH group of the growing DNA strand, which is why elongation occurs in the 5' to 3' direction.

Which of the Following Is a Reason That a New