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after the process of DNA replication is complete, some of the newly created DNA strands had...

after the process of DNA replication is complete, some of the newly created DNA strands had some pieces of RNA. what is the likely reason for this?
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There are mainly two situation where RNA can be found on DNA template.

1)During normal replication process RNA primers are addee for polymerasation to occur though these RNA primers are normally clean up by RNAaseH(in eukaryotes) and DNA polymerase 2 in prokaryotes.

2) main situation of RNA left over can occur here during telomere synthesis where after extension of DNA strand, a complementary RNA primer is aaded to complete synthesis of complementry strand of extended strand of DNA. Here RNA primer dont get clean up .

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