Cloning Vectors
Cosmid vectors are used for

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

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Cloning Vectors
Conjugative plasmids

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

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Cloning Vectors
Cosmids lack

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

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