Cloning Vectors
Cosmid vectors are used for

cloning prokaryotic DNA only
cloning large fragments of DNA
cloning eukaryotic DNA only
cloning small fragments of DNA

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Cloning Vectors
Cosmids lack

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

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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)
inability of a plasmid to grow in the host
None of these

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