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Cos sites in a cosmid vector are related to what?

Answer and explanation

Correct answer: Lambda phage DNA packaging

A cosmid carries cos (cohesive-end) sites derived from bacteriophage lambda. These sites are required for packaging DNA into lambda phage particles, so lambda phage DNA packaging is correct. The origin of replication is a separate plasmid sequence and is not the function of a cos site. Exam tip: remember that cosmids combine useful features of plasmids and lambda phage.

Related tags

Cosmid VectorCos SitesLambda PhageDna PackagingCloning VectorsPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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