21. Retro viruses have genetic matetial which is
22. Genetic engineering is possile because
A. the phenomenon of transducation in bacteria is well understood
B. we can see DNA by electron microscope
C. we can cut DNA at specific sites by endonucleases like DNA ase I
D. restrication endonuclease purified from bacteria can be used in vitro
Answer : Option A
23. Plasmids are the suitable vectors for genetic cloning as.....
A. they are indispendable
B. they are self replicating units
C. they are essential for bacterial reproducation
D. None of the above
Answer : Option B
24. Which of the following is used in genetic engineering ?
25. The first hormone artificially produced by culturing bacteria is______
26. When the number of genes increases in response to some signal the effect is called.....
27. Which one of the following pairs is correctly matched ?
A. RNA polymerase - RNA primer
B. Restrication enzymes - Genetic engineering
C. Centeral dogma - codon
D. okazaki fragments - splicing
Answer : Option B
28. Plasmids are autonomously replicating mini chromosomes found in......
A. Bachterio phage lambda
B. Leishmania donovani
C. Escherichia coli
D. para moecium caudatum
Answer : Option C
29. Improvement of genotype of an organism by addition of some foreigm gene is......
A. genetic diversity
B. gene handing
C. tissue cutlure
D. genetic engineering
Answer : Option A
30. Two bacteria found to be very useful in genetic engineering experiments are......
A. Nitrosomonas and Klebsiella
B. Escherichia and Agrobacterium
C. Nitrobacter and Azotobacter
D. Rhizobium and Diplococcus
Answer : Option B