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Which part allows a vector to replicate in a host?

Answer and explanation

Correct answer: Origin of replication

The origin of replication, commonly abbreviated ori, is the DNA sequence at which replication of a vector begins in its host cell. It is recognized by the host replication machinery and helps determine whether the vector can be copied and, in some systems, how many copies are maintained. Thus option A is correct. An antibiotic plate is used for selection after transformation, but it is not a replication site. A gel band is only a visible result of electrophoretic separation and has no role in copying DNA. A protein coat alone also cannot provide the DNA signals required for plasmid replication. The governing concept is that every autonomously replicating vector needs a functional origin.

Related tags

Origin Of ReplicationOriVector ReplicationCloning VectorCloning VectorsPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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