Cloning Vectors
Select the wrong statement about plasmids?

It is double stranded
Its replication depends upon host cell
It is closed and circular DNA
It is extrachromosomal

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Cloning Vectors
Conjugative plasmids

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

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Cloning Vectors
Phagemid consist of

plasmid vector carrying λ phage's cos site
plasmid vector carrying origin of replication of plasmid only
plasmid vector carrying λ attachment (λ att) site
plasmid vector carrying origin of replication of λ phage only

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Cloning Vectors
Cosmids lack

origin of replication
cleavage site for the insertion of foreign DNA
genes coding for viral proteins
marker genes coding for replication

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