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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31. 5-fluoro orotic acid inhibits the growth if one of the following marker is present in the yeast. That is
A.His 3
B.Lys 2
C.Ura 3
D.Trp 1

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32. Which of the following promoters is repressed in presence of glucose?
A.Galactokinase (GAL 1)
B.Acid phosphatase (PHOS)
C.Both (a) and (b)
D.Phosphoglycerate kinase (PGK)

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33. Which of the following can be used for reducing the size of gene inserts containing introns?
A.Vaccinia virus
B.Baculo virus
C.Retro virus
D.none of these

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34. Bovine papilloma virus has a circular double stranded DNA genome of about
A.2.5 kb
B.5.2 kb
C.7.9 kb
D.9.5 kb

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35. Retroviruses consist of
A.Ds DNA genome
B.Ss DNA genome
C.RNA genome
D.cDNA genome

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