Cloning Vectors
Plasmids which are maintained as limited number of copies per cell are known as

relaxed plasmids
all of these
stringent plasmids
cryptic plasmids

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Cloning Vectors
Conjugative plasmids

do not exhibit antibiotic resistance
do not carry transfer genes
exhibit antibiotic resistance
carry transfer genes called the tra genes

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Cloning Vectors
Cosmid vectors are

plasmids that contain fragment of λ DNA including the cos site
plasmids that have no selection marker
phages that lack cos site
cryptic plasmids

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