Cloning Vectors
Cosmid vectors are used for

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

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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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Cloning Vectors
Charon vectors are different from EMBL vectors because

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

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