31. 5-fluoro orotic acid inhibits the growth if one of the following markers 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 the 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. Retrovirus
D. none of these
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34. Bovine papillomavirus 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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