21. Cos cell line is
A. cohesive end site of phage λ
B. derivative of permissive CV-1 monkey cell line
C. cohesive initial site of phage λ
D. derivative of non-permissive CV-1 monkey cell line
22. Lytic infection of SV 40 does not occur in
A. permissive cells
B. nonpermissive cells
C. both (a) and (b)
D. none of these
23. Moloney-Mu-leukemia virus is an example of
A. Vaccinia virus
B. Baculo virus
C. Retrovirus
D. none of these
24. Which one of the following is true about Yeast Integrative plasmids (YIp) vectors?
A. Allows transformation by using crossing over
B. Has an origin of replication and rep genes
C. Carries autonomously replicating sequence
D. Carries centromere and telomere sequences
25. The size of the genome of SV 40 is
A. 7.2 kb
B. 69 kb
C. 5.2 kb
D. 110 kb