26. YAC vectors can be used to obtain artificial chromosomes because it carries
A. centromere
B. telomere
C. autonomously replicating sequence
D. all of these
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27. Maximum insert size in case of adenovirus vectors is
A. 6-8 kb
B. 4-6 kb
C. 10-12 kb
D. 20 kb
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28. SV 40 vectors, in which late region replacements are done, require
A. COS cell line
B. SV 40 helper virus
C. pBR 322 vector
D. none of these
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29. Which of the following(s) is/are the most commonly used markers in yeast?
A. His 3
B. Ura 3
C. Trp 1
D. All of these
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30. Which of the following are produced in high copy number?
A. YEp
B. YRp
C. Both (a) and (b)
D. YCp
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