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Why is a unique restriction site useful in a cloning vector?

Answer and explanation

Correct answer: To cut the vector at one controlled place

A unique restriction site is a single recognition site for a particular restriction enzyme within the vector. Cutting at this one defined position opens the vector in a predictable way and provides a suitable location for inserting foreign DNA. If the same enzyme cut at several sites in the vector, it could fragment or disrupt essential vector elements such as the origin of replication or selectable marker. Option A is correct because one unique site enables controlled opening and insertion. Host enlargement, gel cooling, and protein dissolution are not functions of restriction sites or cloning vectors.

Related tags

Unique Restriction SiteControlled InsertionRestriction EnzymesPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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