Hello All! I have a Bio Test on DNA Replication tomorrow and I had a quick question. (I'm in 8th grade) When the text book states that DNA can only be replicated from the 5' to 3' direction, I don't get it. If it's like this PT. B -> 5' ---------- 3' 3' ---------- 5' <- PT. A Couldn't there be a polymerase working from both point A and B? Since they're both starting at the 5' direction??? (I have read Yggdrasil's response to a similar question, but it was kind of fuzzy to me...) And if you guys have the time, it would be Awesome if you guys could also add a quick summary of DNA replication too! Yggdrasil, and all, I would love it if you guys have a quick and easy to understand summary of this topic. Thank you!