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Protection by covalent attachment of proteins in a plasmid, is a method for?

Protection by covalent attachment of proteins in a plasmid, is a method for? Correct Answer protection of linear DNA

Not all plasmids exist as circular molecules, linear plasmids have been found in some species and to protect them, methods are: repeated sequences ending in terminal DNA hairpin loop or the ends are protected by covalent attachment of a protein.

Related Questions

"A complete restriction digestion of a circular plasmid (5000bp) was carried out with HindIII, BamHI and EcoRI individually. Restriction digestion yielded following fragments.
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Plasmid + BamHI → 5000bp
Plasmid + EcoRI → 2500bp
The number of sites for EcoRI, BamHI and HindIII present on this plasmid are"
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