6. λ ZAP vector is an example of
A. phage
B. phagemid
C. cosmid
D. plasmid
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
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
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
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