Why dna has to be in fragments


Problem:

I understand multiple origin bubbles; DNA polymerase only synthesizes DNA from 5' to 3' and all that. But what I don't understand is why it has to be in fragments. Yes, DNA is anti parallel, and so the DNA elongates in opposite directions, since DNA polymerase can only go one way.

Required:

Question: Why not go on just like the leading strand? Please describe it in detail.

Question: Why not continue happily along the DNA template continuously but in fragments?

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Biology: Why dna has to be in fragments
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