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
11. Plasmid incompatibility is
A.inability of a plasmid to grow in the host
B.inability of two different plasmids to coexist in the same host cell in the absence of selection pressure.
C.both (a) and (b)
D.none of the above
12. P1 cloning vector allow cloning of DNA of the length of
A.100 kbp
B.50 kbp
C.20 kbp
D.10 kbp
13. Charon 34 and Charon 35 can clone DNA upto
A.1-2 kb
B.6-7 kb
C.9-20 kb
D.30-35 kb
14. Charon vectors are different from EMBL vectors because
A.they have more extensive range of restriction targets with in their polylinkers.
B.physical separation of lambda arm from central fragment is required
C.both (a) and (b)
D.physical separation of lambda arm from central fragment is not required
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