Cloning Vectors
Charon vectors are different from EMBL vectors because

both (a) and (b)
they have more extensive range of restriction targets with in their polylinkers.
physical separation of lambda arm from central fragment is not required
physical separation of lambda arm from central fragment is required

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Cloning Vectors
Conjugative plasmids

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

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Cloning Vectors
Plasmid incompatibility is

None of these
inability of two different plasmids to coexist in the same host cell in the absence of selection pressure.
both (a) and (b)
inability of a plasmid to grow in the host

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