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Which vector feature helps it remain maintained in a host?

Answer and explanation

Correct answer: Ori and selectable marker

The governing concept is stable maintenance of a cloning vector in a host cell. The origin of replication, or ori, is the DNA sequence at which vector replication begins; without an effective ori, the vector may not be copied and can be lost during cell division. A selectable marker, such as an antibiotic-resistance gene, does not itself replicate the vector, but it allows researchers to grow cells under selection so that cells retaining the vector are favoured and identified. Thus option A is the best answer because ori supports replication and the selectable marker supports recovery and maintenance under selection. Chlorophyll, fat, and soil are not standard vector-maintenance features.

Related tags

Origin Of ReplicationSelectable MarkerVector MaintenanceCloning VectorsPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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