I'm not exactly sure how multiple replication bubbles work, assuming were working with a linear, eukaryotic chromosome.
This is a diagram for reference:
It appears that the DNA is being synthesized "towards" the centre. What I mean is that in one replication bubble, the top strand is being replicated from left to right, whereas for the other replication bubble, the top strand is being replicated from right to left.
I don't understand why this is. Aren't the directions reversed? Isn't synthesis always supposed to be from 5' to 3'?