6. λ ZAP vector is an example of

A. phage
B. phagemid
C. cosmid
D. plasmid

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7. λ gt 10 and λ gt 11 vectors can propagate cloned fragments up to

A. 6-7 kb
B. 1-2 kb
C. 40-44 kb
D. 20-23 kb

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8. Select the wrong statement about plasmids?

A. It is extrachromosomal
B. It is double-stranded
C. Its replication depends upon host cell
D. It is closed and circular DNA

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9. Stuffer is

A. the right arm of the vector DNA
B. the left arm of the vector DNA
C. central fragment of the vector DNA
D. none of the above

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10. Conjugative plasmids

A. exhibit antibiotic resistance
B. do not exhibit antibiotic resistance
C. carry transfer genes called the tra genes
D. do not carry transfer genes

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