The presence of a specific plasmid in a bacterial cell may be determined if the plasmid ________.
A) is exceptionally large
B) is an expression vector
C) contains pieces of a viral genome
D) contains a selectable marker

Question

Quizplus · Accepted Answer

A selectable marker in a plasmid allows for the identification of cells that have taken up the plasmid through a screening process. This is often done through antibiotic resistance or other similar markers. Therefore, the presence of a plasmid can be determined if it contains a selectable marker.

The Presence of a Specific Plasmid in a Bacterial Cell