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Why is an enzyme chosen that cuts a vector at only one place in cloning?

Answer and explanation

Correct answer: To open the vector in a controlled way

A restriction enzyme with one recognition site in a vector makes a unique cut and converts the circular plasmid into a linear molecule with defined ends. This controlled opening provides a predictable location where the desired insert can be joined, often using compatible sticky ends or suitable blunt ends. Because the vector is not cut at many unrelated positions, essential replication or selectable-marker regions are less likely to be disrupted, and the intended recombinant structure is easier to obtain and analyse. The enzyme does not automatically make protein, destroy all vector DNA, or stop electrophoresis. Therefore option C is correct.

Related tags

Cloning VectorUnique Restriction SiteVector LinearizationCloning VectorsPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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