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Write the role of 'ori' and 'restriction...

Write the role of 'ori' and 'restriction site' in a cloning vector PBR322.

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Ori is the site where replication starts. This site is responsible for controlling the copy number of a vector. Restriction site is the site of ligation of alien/foreign DNA in the vector, in one of the two antibiotic resistance sites or coding sequence of `beta`-galactosidase.
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