Cloning Vectors
Phagemid vectors are

combination of plasmid and phage λ
combination of phages and cosmid
phages carrying properties of plasmids
All of these

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Cloning Vectors
Plasmid incompatibility is

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

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Cloning Vectors
Cosmids lack

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

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